In DeCristofano's book, she describes black Holes as if they were whirlpools. They work like a swirling current that sucks in anything nearby. Things that are further away aren't affected. They are too far to feel the whirlpool's pull. But anything close had better watch out! Fish, driftwood, and fallen leaves can all get sucked into a whirlpool. This is how a black hole sucks in space materials.
(Corrected paragraph. ^)
I believe the answer is "D."