The Magnetic Field at a Distance R from One Current-Bearing

Multiple Choice

The magnetic field at a distance r from one current-bearing wire, with a second identical wire the same distance r on the opposite side of the first wire, is (using the superposition principle)

A) double what it would be due to a single wire.
B) three-halves what it would be due to a single wire.
C) five-fourths what it would be due to a single wire.
D) half what it would be due to a single wire.