—I went to work on foot yesterday, though it was raining cats and dogs.

—You      a bus. You were likely to get a cold.

A．must have taken

B．would take

C．should have taken

D．could take

背景材料：
我国南方某两车道隧道呈南北向展布，隧道最大埋深为80m，隧道全长470m，隧道进出口段的围岩为较软岩，岩体破碎，且BQ值＜250。隧道洞口覆盖层较薄，有坍方、落石等危害，且有较大的偏压。隧道施工地段无有害气体。隧道采用钻爆法开挖之后，及时施作第一次衬砌。通过施工和监控量测，确定围岩变形稳定之后，修筑防水层及施作第二次衬砌。
根据以上材料，完成下列题目：

隧道进出口处宜设置( )。

A．涵洞

B．通道

C．明洞

D．暗洞