Ernesto has a jump rope that is 10.5 feet long. To make the jump rope the ideal length for his height, Ernesto needs to cut off 0.3 of the jump rope. If Ernesto does this, how much of the jump rope will he cut off? (A) 0.305 foot
(B) 0.315 foot
(C) 3.05 feet
(D) 3.15 feet