参考答案

正确答案：A
解析：文章第三段第一、二句“Events which have strong meaning for us are particularly likely to be upgraded into the long-term memory．Part of the reason is probably that we go over and over these memories，keeping the pathways stimulated and the electrical current high”说明，印象深刻的事件之所以能进入长期记忆，其部分原因是我们在记忆中将这些事件反复再现。A项与之相符，为正确答案。