Why is it often colder on cloudy summer days

A: more sunlight is transmitted than reflected by the white upper surfaces of clouds
B: more sunlight is absorbed then transmitted by the dark lower layer of clouds
C: more sunlight is reflected then transmitted by the white upper layer surface of clouds
D: more sunlight is reflected then transmitted by the dark lower layer of clouds

A: more sunlight is transmitted than reflected by the white upper surfaces of clouds

Clouds act as a barrier, preventing the sunlight from reaching the surface of the Earth, which can result in lower temperatures on cloudy summer days.