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Which of the above solids has the larger surface are?

The answer is A, since the volume of A is 216cm^3 and the volume of B is 160cm^3, this means that solid A has a larger surface area than solid B.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.