What do these channels indicate about past events on Mars?
A)there were explosive volcanic eruptions
B)strong winds eroded into a series of volcanic layers
C)the surface once had running water that eroded and deposited sediment
D)glaciers once covered the entire planet

Question

What do these channels indicate about past events on Mars? 
A)there were explosive volcanic eruptions 
B)strong winds eroded into a series of volcanic layers 
C)the surface once had running water that eroded and deposited sediment 
D)glaciers once covered the entire planet

Quizplus · Accepted Answer

The channels indicate that there was running water on Mars which eroded and deposited sediment.

What Do These Channels Indicate About Past Events on Mars