[单选题]
A proton travels through + 3.h)5)7ayrxbtp yszci3rthbdo(8lxh5k3 b a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the protono(x 85 lbbh3kd's resulting orbit?
A. $0.080 \; m$
B. $0.11 \; m$
C. $0.14 \; m$
D. $0.17 \; m$