We see impact craters on the slopes of large Martian volcanoes.What does that tell us about the volcanoes?
A)They are billions of years old
B)They attract infalling meteoroids
C)There have never been rivers on the volcano slopes
D)They produce lava that is laid down in very thin layers

Question

Quizplus · Accepted Answer

Impact craters on the slopes of large Martian volcanoes indicate that these volcanoes are billions of years old, as it takes a long time for enough meteoroids to accumulate to form visible craters.

We See Impact Craters on the Slopes of Large Martian