Without His Contact Lenses,Mr

Multiple Choice

Without his contact lenses,Mr.Chong can focus from 0.80 m to infinity.What refractive power of the lenses does he require for normal reading (0.25 m from the eyes) ?

A) 1.25 diopters
B) 2.75 diopters
C) 4.00 diopters
D) 5.25 diopters
E) -5.25 diopters