[单选题]
If a person's eyeball s(ggpo uhk6.: is too short from fg+ 3fo;qpezly he++ q((f ttm7bz,pz0 ront to back, the person is likely to sufz3+qz(m ++z0 eh pgpbeftt;l ,7fo yq(fer from
A. astigmatism.
B. spherical aberration.
C. farsightedness.
D. nearsightedness.