We suspect that Mars once had liquid water on its surface because
A) mapping satellites have detected dry river beds.
B) rovers have detected minerals that must have formed in the presence of liquid water.
C) mapping satellites have detected outflow channels coming from impact craters.
D) All of the above

Question

Quizplus · Accepted Answer

All the given options provide evidence that supports the claim that Mars once had liquid water on its surface. Dry river beds and outflow channels suggest the existence of flowing water in the past, while the detection of minerals that form in the presence of liquid water provides further evidence to support this theory. Therefore, option D is the best choice as it includes all the above evidence.

We Suspect That Mars Once Had Liquid Water on Its