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 × 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 °C. If the atmosphere reflected 40.0% and absorbed 60.0% of the solar radiant energy, then what is the average temperature of the Earth's atmosphere?

A) −26 °C
B) −27 °C
C) −28 °C
D) −29 °C
E) −30 °C