Which of the following best describes the process that resulted in the Valles Marineris on Mars?
A) Stream erosion carved a deep central valley.
B) A comet skimmed across the surface of the planet.
C) Down-faulting created grabenlike valleys.
D) A violent volcanic eruption blasted out a long caldera.
Answer: C
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Indicate whether the statement is true or false
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Answer the following statement true (T) or false (F)
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