Two Physicists, One on the East Coast and One on the West

Two physicists, one on the east coast and one on the west coast of North America, discover that they have constructed ideal blackbodies in their laboratories. The two blackbodies are made from very different materials. Without conducting tests, they know that the radiation emitted by these two objects will be

A) identical if the blackbodies are at the same temperature, but not otherwise.
B) identical if the blackbodies have the same size, even if their temperatures are different.
C) different because the blackbodies were made from different materials.
D) different because the amount of light falling on the blackbodies is likely to be different in the two laboratories.