5. The enhanced greenhouse effect is due to
(A)increased trapping of infrared radiation emitted from the Earth's surface and oceans.
(B)decreased trapping of infrared radiation emitted from the Earth's surface and oceans.
(C)increased trapping of visible and ultraviolet radiation emitted from the Earth's surface and oceans.
(D)decreased trapping of visible and ultraviolet radiation emitted from the Earth's surface and oceans.