[单选题]
A proton travels throug zxxwddcyoh4j-0h)3 4h a pote+ 4ew ojqxvav4 jl0l0/ntial of 1.0 kV and then moves into a magnetic field of 0.040 T. Wh/j4+lwl v4o xj0vqa0eat is the radius of the proton's resulting orbit?
A. $0.080 \; m$
B. $0.11 \; m$
C. $0.14 \; m$
D. $0.17 \; m$
