Section: (none)
Explanation/Reference:
The seven causes of "hard conflict" are: (1) Schedules, (2) Priorities, (3) Resources, (4)
Technical issues, (5) Administrative issues, (6) Personality and (7) Cost. `A' relates to
technical issues. `C' relates to administrative issues and `D' relates to cost conflicts. So,
Answer `B' - ambiguity of roles that is a "soft cause. Other soft causes include: lack of
perceived relationships between the project's goals and top management's goals, lack of
open support for the project by senior management etc.

Explanation
= This answer is based on the agile practice of backlog management, which is the process of creating, prioritizing, refining, and maintaining the backlog items with the project team and the product owner. The product owner is the person responsible for defining and communicating the vision, value, and scope of the product or service. By meeting with the product owner to review the project backlog, the project manager can ensure that the requirements are clear, complete, and aligned with the customer's needs and expectations. This will also help to resolve any ambiguities, inconsistencies, or gaps in the requirements, and to adjust the backlog items as needed based on the feedback and changes. References: (Project Management Professional (PMP) Reference Materials source and documents) A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Seventh Edition, Chapter
14: Enabling Change, Section 14.2: Leading the Team, page 334.
Agile Practice Guide, Chapter 3: Life Cycle Selection, Section 3.3: Implementing Agile: Creating an Agile Environment, page 32.