What Property of Mars Is Responsible for Producing the Great

Multiple Choice

What property of Mars is responsible for producing the great heights of its volcanoes?

A) Its cold temperatures allow the magma to freeze faster.
B) Its thick crust can support larger peaks, and lower surface gravity does not pull them down asmuch as on Earth.
C) Mars has more radioactive material than the Earth.
D) Its higher surface gravity allows higher peaks to form.
E) Its volcanoes are made of sulfur, like Io's.