Explanation
Tracing a requirement is the linkage of the requirements to all the parts of solution including its execution and creation.
Answer C is incorrect. This is not a valid definition of tracing a requirement. Requirement tracing does not
consider risk, cost, quality, and other scope elements.
Answer A is incorrect. This is not a valid definition of tracing a requirement. It does not examine its position
in the project WBS.

Explanation/Reference:
When there are large groups of stakeholders, such as in this example, it's practical to find a group of stakeholders that can serve as representatives for the remainder of the stakeholders.
B is incorrect. It's not feasible, as the question indicates, for this large group of administrative
assistants to attend requirements gathering workshops.
C is incorrect. You can't assume that one small group of the administrative assistants needs is
truly indicative of the reminder of the administrative assistants.
D is incorrect. The administrative assistants' managers likely don't know enough detail of how the
administrative assistants currently do their work to speak on their behalf.

A state model describes:
* a set of possible states for an entity,
* the sequence of states that the entity can be in,
* how an entity changes from one state to another,
* the events and conditions that cause the entity to change states, and
* the actions that can or must be performed by the entity in each state as it moves through its life cycle.
While a process model can show all of the entities that are used in or affected by that process, a state model shows a complementary view: what happens to one entity across all the processes that affect it or use it.