A He threw 20 balls in one stroke, that's right. 16 divided by 0.8 equals 20.
He lost the remaining three goals. That's right. The remaining ball was 5, and he made three of two shots.
C's shooting percentage is 80% of the remaining balls, that's right. 2 divided by 5 equals 0.4.
So the answer is e, all of them.