On an Overcast Night, as Opposed to a Night with a Clear

On an overcast night, as opposed to a night with a clear sky, the thermal environment experienced by a desert rodent will be

A) warmer because less radiant heat is lost to an overcast sky.
B) warmer because the rodent has lower emissivity when the sky is overcast.
C) cooler because the rodent has higher emissivity when the sky is overcast.
D) cooler because the atmosphere's convective coefficient is increased by an overcast sky.