[单选题]
A proton travels through a potential ofbl tc 1)ym)2ibq6qw n7x*cf l9 1.h1gc1e v0a- xd0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's 1ha0cg 1d-vex resulting orbit?
A. $0.080 \; m$
B. $0.11 \; m$
C. $0.14 \; m$
D. $0.17 \; m$
