After a fixed IOL is installed, it is found to have the wrong focal length, so a

Question:

After a fixed IOL is installed, it is found to have the wrong focal length, so a piggyback IOL is installed as well. The piggyback IOL has a power of -1.50 diopters. What is its focal length and type?
A. converging, 1.50 m
B. converging, 66.7 cm
C. diverging, 1.50 m
D. diverging, 66.7 cm