【正确答案】 A

【答案解析】stringent, stern, austere三者都有严厉的意思，但用法并不同，含义也有区别。Stringent means having a very severe effect, or being extremely limiting. E. g. we need to introduce more stringent measures such as identity cards．它指措施、操作等是严格的。Stern means severe, or showing disapproval. E. g. a stern look/ warning它指严厉的，一般用来指人。Austere means without comfort, or plain and without decoration, or severe．它指的是环境严峻，或地方简朴无多余装饰。用来指人指庄重的。所以据题意应该选A。