On a Clear Night,the Minimum Temperature Drops to 34 F

On a clear night,the minimum temperature drops to 34 F.The following night,fog forms early in the evening.It is a good bet the minimum temperature will not be as low because of the

A) enhancement of the greenhouse effect by the fog cloud.
B) trapping of smoke and dust by the water vapor.
C) calm winds that accompany fog.
D) all of the above