Generally PERT is preferred over CPM for the

Question

Assertion (A): Generally PERT is preferred over CPM for the purpose of project evaluation                     

Reason(R): PERT is based on the approach of multiple time estimates for each activity

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true