What is the PRINCIPAL reason we have no volcanoes on Earth anywhere near the size of Olympus Mons?
A) Mars' smaller gravity allows the formation of taller structures without crumbling.
B) Because Mars is smaller than Earth, it retained its interior heat longer and allowed volcanic activity for a longer time.
C) Because of tectonic activity on Earth, a volcano does not sit over the same spot for long periods, therefore allowing it to continue to grow.
D) Because of colder temperatures on Mars, lava solidified more quickly before it had time to move far from the volcanic cone.
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