Put the steps of the greenhouse effect in the correct order. I. Infrared radiation travels through the atmosphere as heat to leave Earth.
II. Radiation from the sun enters the atmosphere.
III. Increased greenhouse gases trap more heat, raising global temperature.
IV. Infrared radiation is absorbed by greenhouse gases and is reflected back down to Earth.

A. II, IV, III, I
B. I, II, III, IV
C. I, III, II, IV
D. II, I, IV, III