On a sunny day, a driver parks his car with all the windows closed. When he returns to the car, he finds it is unbearably hot inside. This is mainly because the infra-red rays from the sun ___.

• A.pass through the windows and are absorbed by the seats which then emit long rays that cannot pass through the glass
• B.are absorbed by the glass windows and the interior heats up by convection
• C.pass through the windows but cannot escape because of total internal reflection
• D.are focused into the interior by the windows which act as lenses