关于液体蒸发和沸腾，下列说法中不正确的是（　　）

A．蒸发和沸腾都属于汽化现象

B．蒸发和沸腾都要吸热

C．蒸发能在任何温度下发生，沸腾只在一定温度下发生

D．蒸发是在液体表面发生的汽化现象，沸腾是在液体内部发生的汽化现象

Had I known about this computer program, a huge amount of time and energy ________. [ ]

A. would have been saved  

B. had been saved    

C. must be saved      

D. was saved