[单选题]
A spherical mirror on wh/4,cginp- 9 e1 xj7ceoveuvi7ich reflection takes zr)2j*)tjn)h6a zck ifr8+m lplace on the outer surface of the spherical+j8rzci6*k)n 2r hj))tfzl ma shape is referred to as a
A. convex mirror.
B. concave mirror.
C. plane mirror.
D. double-sided mirror.
