Subject Matter Experts Often Perform Specific Project Activities When Necessary

Subject matter experts often perform specific project activities when necessary.Which of the following statements regarding subject matter experts is accurate?​ 

A)  The number of subject matter experts is generally limited to fewer than the number of core team members. 
B)  The subject matter experts are typically assigned to the project from start to finish. 
C)  The subject matter experts may not relate strongly to a project due to the temporary nature of their involvement. 
D)  Subject matter experts are brought in for meetings and for performing specific project activities when necessary.