When 50 C of Charge Moves at Constant Speed Along a a Path

When 5.0 C of charge moves at constant speed along a path between two points differing in potential by 12 V, the amount of work done by the field is

A) 2.4 J.
B) 0.42 J.
C) 5.0 J.
D) 12 J.
E) 60 J.