Consider the following statements.
(A) Bodies radiate heat at all temperatures.
(B) Rate of radiation of heat is proportional to the fourth power of absolute temperature.

• A

  Both (A) and (B) are true.

• B

  (A) is true but (B) is false.

• C

  (A) is false but (B) is true.

• D

  Both (A) and (B) are false.