The Main Reason for the Very High Temperature (750 K)

The main reason for the very high temperature (750 K) on the surface of the planet Venus is thought to be

A) chemical reactions between constituents of the atmosphere, particularly sulfuric acid.
B) radiation from hot lava, produced by intense and continuous volcanic action.
C) continuous bombardment of the surface by solar wind particles and meteoroids.
D) absorption of visible radiation by the Venusian surface and the subsequent trapping of infrared radiation emitted by the surface, by the atmosphere, and clouds.