Air That Is Not Saturated Will Cool or Heat at a Rate

Air that is not saturated will cool or heat at a rate of ________ as it rises or descends, respectively.

A) 10 C° per 1000 m (5.5 F° per 1000 ft.)
B) 6 C° per 1000 m (3.3 F° per 1000 ft.)
C) 6.4 C° per 1000 m (3.5 F° per 1000 ft.)