50. When traveling, you are always advised to take travelers\' checks, which provide a safe ____ to carrying your money in cash. A. substitute B. selection C. prevention D. alternative幫助詳細解答下，謝謝？

熱心網友

substitute 代替，一般和for連用（如substitute A for B 用A代替B）；selection 選擇prevention 預防；防止alternative 可替代的由此可知選D

熱心網友

.........不是選A嗎.....那就不太了解了...等我去查一下哈