Positive slack indicates the maximum amount of time __________

a	that each of the activities in the project can be delayed without jeopardizing completion of the project by the required completion time.
b	that the activities on the critical path should be accelerated to complete the project by the required completion time.
c	that the activities with the positive slack should be accelerated to complete the project by the required completion time.
d	that the activities on a particular path can be delayed without jeopardizing completion of the project by the required completion time.