Choose the one alternative that best completes the statement or answers the question. -What is the focal length of a contact lens that will allow a person with a near point

Choose the one alternative that best completes the statement or answers the question.
-What is the focal length of a contact lens that will allow a person with a near point of 125 cm to read a physics book held 25.0 cm from his eyes?
A) 10.2 cm
B) -100 cm
C) 31.3 cm
D) 20.8 cm
E) -31.3 cm

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