Radiant Energy from the Sun Reaches the Earth at a Rate

Radiant energy from the Sun reaches the Earth at a rate of 1.70 $\times$ 10¹⁷ W.When 30.0% of the radiant energy is reflected and 70.0% absorbed,the average temperature of the Earth's atmosphere is 253 K or -20.0 $^{\circ}$ C.If the atmosphere reflected 20.0% and absorbed 80.0% of the solar radiant energy,then what is the average temperature of the Earth's atmosphere?

A) -10.1 $^{\circ}$ C
B) -11.4 $^{\circ}$ C
C) -12.3 $^{\circ}$ C
D) -14.5 $^{\circ}$ C
E) -17.4 $^{\circ}$ C