Two Long Straight Wires Pierce the Plane of the Paper

Multiple Choice

Two long straight wires pierce the plane of the paper at vertices of an equilateral triangle as shown below. They each carry 2.0 A, out of the paper. The magnetic field at the third vertex (P) has magnitude:

A) 5.0 * 10^-6 T
B) 8.7 *10^-6 T
C) 1.0 * 10^-5 T
D) 1.7* 10^-5 T
E) 2.0 * 10^-5 T