[单选题]
If a person's eyeball is iu9k q;:v.t9 j3abd9t q .yx7bhcooa.d*rq4w- (:r vnh5wpvytoo long from front to back, the person is likely to suffer*ynwv-dq(p h w :rv54r from
A. spherical aberration.
B. nearsightedness.
C. farsightedness.
D. astigmatism.
