Afar sighted person can not see clearly objects that are closer to his eyes than 60.0 cm. which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable him to see the objects at a distance of 25.0 cm from his eyes?
a) -42.9 cm, +2.33 diopters
b) -42.9 cm, -2.33 diopters
c) +60 cm, +42.9 diopters
d) +42.9 cm, +2.33 diopters
e) +42.9 cm, -2.33 diopters