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Choose the correct option: A trolley is...

Choose the correct option:
A trolley is moving horizontally with a constant velocity of `v m//s` w.r.t. earth. A man starts running from one end of the trolley with velocity `1.5v m//s` w.r.t. to trolley. After reaching the opposite end, the man return back and continues running with a velocity of `1.5 v m//s` w.r.t. the trolley in the backward direction. If the length of the trolley is L then the displacement of the man with respect to earth during the process will be :-

A

(a) `(4)/(3)`L

B

(b) `(2)/(3)`L

C

(c) `(5L)/(3)`

D

(d) `1.5`L

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