Multiple Choice
The large feature spanning the surface of Mars shown in the figure below is ________ and probably was created by ________. 
A) an impact crater; an asteroid or comet
B) a dry riverbed; flowing water
C) a canyon; a rapid cooling of the crust
D) a canyon; flowing water
E) a highway; an extinct civilization
Correct Answer:
Verified
Correct Answer:
Verified
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