Which of the following is not the reason why the water tray of NETCOL8000-A infrared humidifier is not filled with water?

Which of the following is not the reason why the water tray of NETCOL8000-A infrared humidifier is not filled with water?
A . The water injection pipe is blocked
B . Infrared tube damage
C . The water pressure is abnormal
D . The valve of the water inlet pipe is not open

Answer: B