Overnight Temperatures Are Warmer When the Air Is Humid Because

Multiple Choice

Overnight temperatures are warmer when the air is humid because:

A) water vapor and clouds cause the Earth system to have a higher nighttime albedo.
B) water vapor is a good absorber of incoming shortwave radiation, causing more energy to be stored during the day.
C) water vapor is good at scattering longwave radiation.
D) water vapor is a good absorber of outgoing longwave radiation.