单选题 Recent tensions between the two countries were a direct result of______

A、 their border conflicts
B、 their military build-up
C、 killings in the two countries
D、 their mutual distrust

【正确答案】 C

【答案解析】本题测试关于原因的细节内容的理解能力。根据文中的相关内容“Tensions were raised this week as the two accused each other of links to killings in the two countries"，可判断正确答案为C。