[单选题]
A proton travels through a p6b +-l2.zbjtdzi y+rbz)m fl(ote8 1+k spxf2 -h6mrwawzntial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is tfxrkh 1mw6 wp-+28zashe radius of the proton's resulting orbit?
A. $0.080 \; m$
B. $0.11 \; m$
C. $0.14 \; m$
D. $0.17 \; m$
