The extreme size of volcanoes on Mars indicate that
A) Mars has a much thicker crust than Earth.
B) water once flowed in streams on Mars.
C) large moving plates have not formed on Mars.
D) a and c
E) a,b,and c

Question

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The extreme size of volcanoes on Mars indicates that large moving plates have not formed on Mars (choice C) and that Mars has a much thicker crust than Earth (choice A).

The Extreme Size of Volcanoes on Mars Indicate That