Answer:
A. He exchanged the first rifle he'd bought for a more powerful one.
Step-by-step explanation:
In the days leading up to the assassination, James Earl Ray did exchange the rifle he had initially purchased for a different one. He bought a Remington Gamemaster .30-06 rifle, but later exchanged it for a .30-06 Remington Model 760 Gamemaster rifle with a scope. This change in weapons was part of his preparations for the assassination of Martin Luther King Jr.