Per Unit Area (Such as a Square Centimeter), a B $1 / 81$

Multiple Choice

Per unit area (such as a square centimeter) , a B star whose surface temperature is 10,000 Kwill put out how much radiation compared to an O star whose surface temperature is 30,000 K?

A) 81 times as much
B) 9 times as much
C) $1 / 81$ 1 s much
D) $1 / 9$ s much
E) $1 / 3$ 3 s much