What is the best description of black body radiation?

A. Radiation that comes from a heated object

B. Radiation thats always invisible

C. Radiation from an object with high electrical charge

D. Gamma radiation from interstellar space

A black body radiation will emit a black colored radiation at room temperature and it mostly made up of infrared, which our naked eye cannot detect. so the best description of black body radiation is a radiation that always invisible, because the light it emits are not detected by our eyes,