According to the Stefan-Boltzmann Law, an Object at Room Temperature

According to the Stefan-Boltzmann law, an object at room temperature that is sitting in a room (also at room temperature) must emit electromagnetic radiation. Since it is losing energy by emitting this radiation, why does its temperature remain constant?

A) It receives heat by conduction from the air and from what it is sitting on.
B) It receives heat by convection from the air.
C) It receives heat by radiation from objects in the room.
D) All of the above.
E) Its temperature actually does decrease.
F) It does not actually emit any radiation.
G) Some other explanation (specify)