[单选题]
In a cloud formation, water vapor condenses into water droplets which get bc)apvph5.:mho3 q h7 exe7jq k( zm:w3igger and bigger until it rainj( qzx :3we7kms. This will cause the temperature of the air in the clouds to
A. increase.
B. decrease.
C. stay constant.
D. freeze.
