Multiple Choice
Which of the following is suggested by the flow patterns found on the surface of Mars and the number of craters on top of them?
A) Mars is a planet rich in liquid water in the present day.
B) The climate on Mars was different billions of years ago.
C) Volcanism is occurring on Mars.
D) The polar caps are made of liquid water.
Correct Answer:

Verified
Correct Answer:
Verified
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