On a Cold Day,a Heat Pump Absorbs Heat from the Outside

On a cold day,a heat pump absorbs heat from the outside air at 14 $\degree$ F (-10 $\degree$ C) and transfers it into a home at a temperature of 86 $\degree$ F (30 $\degree$ C) .Determine the maximum COP of the heat pump.

A) 0.2
B) 4.4
C) 0.5
D) 7.6
E) 6.7