Both Impact Craters and Dormant Volcanoes Have Been Found on Mars

Both impact craters and dormant volcanoes have been found on Mars. Where are they?

A) The northern hemisphere contains most of the craters and most of the volcanoes.
B) The southern hemisphere contains most of the craters and most of the volcanoes.
C) The northern hemisphere contains most of the volcanoes, whereas most of the craters are found in the southern hemisphere.
D) The southern hemisphere contains most of the volcanoes, whereas most of the craters are found in the northern hemisphere.