The answer would be “many animals die prematurely in zoos because they are exposed to infectious diseases.” The claim is stating that something bad is happening in zoos and this one is the only bad side effect in the choices.
Answer:
The answer is elaborative rehearsal.
Explanation:
Elaborative rehearsal consists in associating new knowledge with previous knowledge. It's possible to use mnemonic devices (as in the example), as well as summaries, mind-maps and questionnaires.
Elaborative rehearsal is useful for encoding information into the long-term memory.
I think it's B, but I can't guarantee it... Sorry