If D is the duration, ES and EF are the earliest start and finish, LS and LF are latest start and latest
finish time, then the following relation holds good
(A) EF = ES + D
(B) LS = LF - D
(C) LF = LS + D
(D) All the above
finish time, then the following relation holds good
(A) EF = ES + D
(B) LS = LF - D
(C) LF = LS + D
(D) All the above