This is the only way we can imagine_________the overuse of water in students’ bathrooms.

   A. to reduce             B. reducing             C. reduced              D. reduce           

This is the only way we can imagine _____ the overuse of water in students’ bathrooms.

   A. reducing       B. to reduce         C. reduce           D.  reduce

This is the only way we can imagine _______ the overuse of water in the students’ bathrooms.

A. reducing        B. reduced          C. reduce        D. to reduce