What is the missing numerator? 4/6 - ?/8 = 14/48

A.) 05
B.) 04
C.) 03
D.) O2

The answer is b)04 I did this on my test and got it correct

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.