The Magnetic Field at the Midpoint Between Two Parallel (Straight)

Multiple Choice

The magnetic field at the midpoint between two parallel (straight) current-bearing wires (current traveling in same direction) is (using the right-hand rule)

A) double what it would be due to a single wire.
B) equal to what it would be due to a single wire.
C) half what it would be due to a single wire.
D) exactly zero.