When a Human Eye That Has a Power of +60

Multiple Choice

When a human eye that has a power of +60 D is fitted with a contact lens of -10 D,the equivalent lens combination is

A) diverging and of focal length 2 cm.
B) converging and of focal length 50 cm.
C) converging and of focal length 2 cm.
D) focal length 0.02 cm.
E) focal length 0.2 cm.