There Is a Current I Flowing in a Clockwise Direction

Multiple Choice

There is a current I flowing in a clockwise direction in a square loop of wire that is in the plane of the paper. If the magnetic field B is toward the right, and if each side of the loop has length L, then the net magnetic force acting on the loop is:

A) 2ILB.
B) ILB.
C) IBL².
D) zero.