We must also understand how to ______ between what should be remembered and what should be forgotten.

【正确答案】 A

【答案解析】 形近词辨析。根据句意判断，空格处应填人“区分，区别”之意的动词。选项中只有differentiate符合句意。distinct“明显的”；disengage“使脱离，解开”，entangle“使纠缠，卷入”与句意不符。故答案为A。