Compare the Atmospheres of Mars and Venus

Multiple Choice

Compare the atmospheres of Mars and Venus.

A) Both are made of hydrogen and helium, like the jovians.
B) Like Earth, nitrogen is the chief atmospheric gas.
C) Both are chiefly carbon dioxide, but at Mars it can freeze as dry ice.
D) Mars is rich in oxygen, like ours, accounting for its red surface.
E) Both are too hot for water to now exist as a liquid at the surface.