[单选题]
Spherical mirrors suw jsk t9j:va *e;-5wyb fzb34zff 1khrp2gy ez efg.8/2ter from
A. both spherical and chromatic aberration.
B. spherical aberration, but not chromatic aberration.
C. chromatic aberration, but not spherical aberration.
D. neither spherical nor chromatic aberration.