Question

John has three pieces of rope. One piece was 31 cm long, one piece was 0.33 m long, and one piece was 0.45 m long. John wants to know how much rope he has. Which statement best describes how John should figure out the amount of rope he has?

A: Add 31 + 0.33 + 0.45 John has 31.78 cm of rope.

B: Add 31 + 0.33 + 0.45 John has 31.78 m of rope.

C: Add 0.31 + 0.33 + 0.45 John has 1.09 cm of rope.

D:Add 0.31 + 0.33 + 0.45 John has 1.09 m of rope.

help me plz..