题目选项分析

In a recent study published in Nature Neuroscience, a team of scientists concluded that, since participants who took caffeine tablets in a memory test should outperform participants who took placebo tablets, caffeine enhances short-term memory.

In a recent study published in Nature Neuroscience, a team of

scientists concluded that, since participants who took caffeine tablets in a memory test outperformed participants who took placebo tablets in that test,