[单选题]
An electron has an initial velocity to the south but isg1y3 c s cr vp+w;xt11t2wyu k;w3oqq1 observed to curmiq -.gvsqh58e96 .fa:z jotrve upward as the result of a magnetic field. The direction of the magrz6jv 59g: 8oeim- hq t.s.qafnetic field is
A. to the west.
B. to the east.
C. upward.
D. downward.
