[单选题]
A proton travels through a potential of 1.0 kV and t exc1:pq0o kte(a95tdhen mov c s:q;8tf iv 3eym-oxi(v -het )0w(u9d:cwxoes into a magnetic field of 0.040 T. What is the radius of the proton's res yqwdeht u 9ce wc3os-m:0fxi 8 (i(vvt;:xo-)ulting orbit?
A. $0.080 \; m$
B. $0.11 \; m$
C. $0.14 \; m$
D. $0.17 \; m$
