Dust That Is Heated to 30 K Will Emit a Blackbody

Multiple Choice

Dust that is heated to 30 K will emit a blackbody spectrum that peaks at:

A) 1 $\mu$ m
B) 30 $\mu$ m
C) 50 $\mu$ m
D) 100 $\mu$ m
E) 500 $\mu$ m