A Particle Carrying a Charge of +E Travels in a Circular

Multiple Choice

A particle carrying a charge of +e travels in a circular path of radius R in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

A) $R / 2$ .
B) $R / 4$ .
C) $2 R$ .
D) $4 R$ .
E) $8 R$ .