"...the most relevant support for the assertion that lakes may have once existed on Mars..."
I'd choose only A.
To me, D is speculative.
What evidence from “NASA’s Curiosity Rover Finds Clues to How Water Helped Shape Martian Landscape” is the most relevant support for the assertion that lakes may have once existed on Mars?
_(Select all that apply.)_
The rock layers—alternating between lake, river and wind deposits—bear witness to the repeated filling and evaporation of a Martian lake much larger and longer-lasting than any previously examined close-up.
“The great thing about a lake that occurs repeatedly, over and over, is that each time it comes back it is another experiment to tell you how the environment works,” Grotzinger said.
“We may see how the chemistry changed in the lakes over time. This is a hypothesis supported by what we have observed so far, providing a framework for testing in the coming year.”
This interpretation of Curiosity’s finds in Gale Crater suggests ancient Mars maintained a climate that could have produced long-lasting lakes at many locations on the Red Planet.
A and D?
2 answers
There must be another one though. A and B?
3 answers