Suppose the surface temperature of the Sun were about 12000 K, rather than 6000 K. How much more thermal radiation would the Sun emit? Express your answer using two significant figures.
Options:
A) 3.1 × 10²7 W
B) 6.2 × 10²7 W
C) 9.3 × 10²7 W
D) 1.2 × 10²8 W