If E is the duration, ES and EF are die earliest start and finish times, LS and LF are latest start and finish times, then the following relation holds good

If E is the duration, ES and EF are die earliest start and finish tim

1.	If E is the duration, ES and EF are die earliest start and finish times, LS and LF are latest start and finish times, then the following relation holds good
A.	EF = ES + D
B.	LS = LFD
C.	LF = LS + D
D.	All of the above
Answer» E.