[单选题]
A spherical mirror on whidfcd2vtax4l4)5v xg(ch refleclu2ttq6s2cb 5d ,ut 7 iaf6vz2tion takes place on the outer surface of the spherical shape q27 vi 66lbsuzac,2ftd tu2 5tis referred to as a
A. convex mirror.
B. concave mirror.
C. plane mirror.
D. double-sided mirror.
