## Questions 55-56
Two charges are located on the line shown in the figure below, in which the charge at point I is +3 q and the charge at point III is +2 q . Point II is halfway between points I and III.
55. Other than at infinity, the electric field strength is zero at a point on the line in which of the following ranges?
(A) To the left of I
(B) Between I and II
(C) Between II and III
(D) To the right of III