The business analyst generated a design specification for a new product. What is the best type of formal review to conduct with the customer to establish an approved requirements baseline?

When modeling processes or analyzing tasks, business rules can be uncovered by asking about:

A major stakeholder of a project is surprised to learn that a particular requirement was not implemented during the latest launch. The business analyst tells the stakeholder that the requirement status was changed to "deferred".
What could have prevented the stakeholder from being surprised about the status change?

The business analyst wishes lo clarify the project's key business drivers and ensure that requirements can be prioritized to provide maximum business value. Which question should the business analyst ask of stakeholders to help obtain this clarification?

A business analyst has been assigned to a project team that is redesigning the company's website. The business analyst has been documenting the relationships between requirements and has found requirements that do not trace to a business need.
Which type of requirements are these?