Who has the privilege to add, edit, and delete opportunity team members? (Choose two options)

Answer options:

A.Opportunity Owner
B.Users above the owner in the role hierarchy
C.Users below the owner in the role hierarchy
D.Any sales user

Correct Answer: A and B 
Only opportunity owner and users above the owner in the role hierarchy have the privileges to add, edit, and delete opportunity team members. 
Options C and D are incorrect because any sales user and users below the owner in the role hierarchy cannot add, edit or delete opportunity teams. 
Reference: 

https://help.salesforce.com/articleView?id=salesteam_def.htm&type=5