[单选题]
A farsighted person can read a newspaper held 25 cm+;e u-dnhm8,agw zvr+ from his eyes, iykxyfxeyb: -4d7j)+. ghl g1uf he wears glasses x+hg.eb1 ky g-yjy)l4fux7:d of +3.33 diopters. What is this person's near point?
A. $4.2 \; cm$
B. $25 \; cm$
C. $31 \; cm$
D. $1.5 \; m$