What Evidence from the Careful Examination of Impact Craters Provides

question 99

Multiple Choice

What evidence from the careful examination of impact craters provides evidence that Mars had surface water long ago?

• A) indistinct rims of many large craters due to water erosion
• B) lack of small craters which would have been erased by ancient rainfall
• C) channels where water once flowed between crater lakes
• D) all of these