In the diagram of AABC, points D and E are on AB and CB, respectively, such that AC || DE. If CE = 36, BE = 12, and DE = 6, what is the length of AC?

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.