[单选题]
If a person's eyeball 4fb :w/0w i cigp73pphis to.emfh y94qf g1e u/7hz9 nwq*qo long from front to back, the person is likely to suffer fr1q4w eqgf7zmfqyneu/.* h9h9om
A. spherical aberration.
B. nearsightedness.
C. farsightedness.
D. astigmatism.
