To Implement a Time Buffer (Circle One)

Multiple Choice

To implement a time buffer (circle one) :

A) start with the early finish time, and move it up (make it earlier)
B) start with the early finish time, and move it back (make it later)
C) start with the late finish time, and move it up (make it earlier)
D) start with the late finish time, and move it back (make it later)