A roller coaster climbs 110 feet from ground level then drops 65 feet before climbing another 135 feet. How far does the coaster need to drop or climb to be back at ground level.

Responses
A Drop 70 feetDrop 70 feet
B Drop 180 feetDrop 180 feet
C Climb 70 feetClimb 70 feet
D Climb 180 feet

To be back at ground level, the coaster needs to drop 70 feet.