Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

A grey body is a body (object) that emits radiation at each wavelength in a constant ratio less than unity to that emitted by a black body at the same temperatures.

A grey body is a physical body whose absorptivity of a surface does not vary with variation in temperature and wavelength of the incident radiation.

Explain please.

The answer is true, According to Kirchoff's law Absorvity equal to emissivity.

I think answer is B because at different temperature absorptivity is different.