[单选题]
A stationary proton is in a uniform magnetic field of 0)8e-runx l, uu.20 T. What is tlsgqy26q8zf4l7mg0 bn. u.*/ ap gee fhe magnitude of the magnetic force on the 0fe fg7ps8qla.2nz* qmb.gly6 gu4 e/proton?
A. zero
B. $1.6 \times 10^{-20} \; N$
C. $3.2 \times 10^{-20} \; N$
D. $1.6 \times 10^{-21} \; N$
