单选题 The United States was trying hard to smoke the enemy out of the holesin the target country．

The United States was trying hard to smoke the enemy out of the holesin the target country．
A．对敌人施以地毯式轰炸 B．将敌人熏死在洞中
C．引诱敌人出洞 D．向洞中的敌人投掷毒气弹