What Power Contact Lens Should Be Used to Correct the Vision

Multiple Choice

What power contact lens should be used to correct the vision of a farsighted person whose near point is 80 cm so she can see things clearly that are 25 cm in front of her?

A) -2.8 diopters
B) +4.2 diopters
C) -4.0 diopters
D) +2.8 diopters
E) -4.2 diopters