Under the CFTA mobility provisions, provincial/territorial regulators must facilitate labour mobility so that a professional licensed in one Canadian jurisdiction can generally obtain licensure in another without being re- assessed for substantially the same requirements, subject to limited exceptions (e.g., good standing, disciplinary status, and administrative steps). This supports A and C: professionals can work across Canada, but they must hold the licence in the jurisdiction where they practise, and licensing transfer/registration should be relatively straightforward for those in good standing. Many regulators also extend mobility processes to internationally trained members who are already licensed in a Canadian jurisdiction (D) because the mobility framework focuses on being licensed in a Canadian jurisdiction and in good standing, not on citizenship.
What is not provided is a single "national" licence that automatically permits practice in every jurisdiction.
Regulation is provincial/territorial, so professionals typically require registration in each jurisdiction where they practise (even if streamlined). Therefore, B is false.

In NPPE terminology, ethics refers to the systematic study of morality-principles and values that guide what people ought to do. It addresses questions about right and wrong conduct, good and bad actions, fairness, integrity, and responsibility, especially where rules do not give a complete answer. This is distinct from law:
laws are enforceable rules established by governments, whereas ethical obligations can be broader than legal minimums and often focus on professional duties to the public, clients, employers, and the profession.
"Duties" (C) relates more specifically to deontology (duty-based ethical theory), which is one approach within ethics rather than the definition of ethics itself. "History" (B) is unrelated. Professional ethics in engineering
/geoscience uses these moral principles to shape expected conduct-such as holding paramount public safety, acting with honesty and integrity, avoiding conflicts of interest, maintaining confidentiality where appropriate, and practicing only within competence. Therefore, the best definition is that ethics is the study of morality (A).

Ethical theories like Mill's Utilitarianism, Kant's Duty-Based Ethics, Locke's Rights-Based Ethics, and Aristotle's Virtue-Based Ethics provide diverse perspectives on ethical problems. They are useful for guiding professionals in resolving ethical dilemmas by presenting varied viewpoints and considerations, rather than prescribing a single solution to all issues .

NPPE professional practice principles emphasize that responsibility for engineering/geoscience work rests with the licensed professional who applies professional judgment, signs/seals work, and relies on the results.
Commercial software is a tool; it does not transfer accountability to the vendor or to a disclaimer. The professional must ensure the software is suitable for the task, inputs and assumptions are correct, limitations are understood, and outputs are validated using checks (hand calculations, benchmark problems, sensitivity analyses, or alternative methods). Even if the employer owns the project and carries organizational liability, the professional remains professionally accountable for the technical validity of results they use and for decisions based on those results. Therefore, the responsibility for accuracy and validity lies with the professional (C), not the software developer (B), not merely the employer (A), and not in any disclaimer (D).

Professional regulators conduct practice/assurance reviews on individuals primarily to ensure that the continuing professional development requirements are met by every licensed professional. This is part of the regulatory framework that helps maintain professional standards and protects public safety by ensuring practitioners remain competent in their respective fields .