Answer:
B
Step-by-step explanation:
An exponential decay shows a decrease. A decreasing line will move down from left to right.
Graph A moves up from left to right.
Graph B moves down from left to right.
Graph C moves up, then levels off from left to right.
Graph D generally moves up from left to right.
The only graph that goes down from left to right is Graph B. Therefore, B is the correct choice.
