Answer:
B. HE CAN PAINT 3 WALLS WITH 1 CAN OF PAINT
Step-by-step explanation:
When you read the problem and it tells you that he can paint 3/4 of a wall with 1/4 of the a can of paint, you see that he paints/applies 3x's more than the paint he is given.
The only answer that is 3x's more than the paint he is given is B.