Please Listen to the following TED talk and answer the questions followed.（1分55秒-2分17秒）

British physicist John Tyndall，in the 1850'；s，made laboratory measurementsof the infrared radiation，which is heat.And he showed that gasses such as CO2（），thus acting like a blanketwarming Earth'；s surface.

A.reflect sunlight

B.reflect heat

C.absorb heat

D.absorb sunlight

正确答案：absorb heat