A proton is moving at a speed of 3.2 × m/s at an angle of 80° to a uniform magnetic field of strength 1.5 × T. What is the distance moved by the proton along the spiral path as it completes one revolution? (This distance is called the "pitch" of the helix.)
A) 220 m
B) 1390 m
C) 1370 m
D) 240 m
E) Cannot be determined