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帮助详细解答下，谢谢？
热心网友
substitute 代替，一般和for连用（如substitute A for B 用A代替B）；selection 选择prevention 预防；防止alternative 可替代的由此可知选D
热心网友
.........不是选A吗.....那就不太了解了...等我去查一下哈