Two Identical Objects Are Placed in a Room with a Temperature

Multiple Choice

Two identical objects are placed in a room with a temperature of 20°C.Object A has a temperature of 50°C,while object B has a temperature of 90°C.What is the ratio of the net power emitted by object B to the power emitted by object A?

A) 1.7
B) 2.8
C) 81
D) 17
E) 21