Subject matter experts often perform specific project activities when necessary. Which of the following statements accurately describes the role of subject matter experts in support of a project?
a. The subject matter experts are typically assigned to the project from start to finish.
b. The subject matter experts may not relate strongly with a project due to the temporary nature of their involvement.
c. Subject matter experts typically approve critical project decisions.
d. none of these

A subject matter expert is a person that is considered to be an authority in a particular field or area. Because of their defined area of expertise they are only invited into a project to perform specific activities.

Due to the temporary nature of their roles in project they don't tend to have a buy-in to the project objectives.

If they were involved in various aspects of the project on a more permanent basis, they would have developed a commitment to see the project through to the end