GMAT Critical Reasoning (CR) | Re: For years, scientists have proposed the idea that Mars was o

Its between option A and B.
C. Out of scope
D. reverse relationship
E. Out of scope

option A is the might be true category, Absence of smoothness of rock of northern hemisphere cannot indicate that oceans were absent. Because we do not have southern hemisphere data we cannot say this accurately

Option B: This would increase the likelihood of the presence of oceans on the planet

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