If D is the duration, ES and EF are the earliest start and finish, LS and LF are latest start and latestfinish time, then the following relation holds good

If D is the duration, ES and EF are the earliest start and finish, LS

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