ExplanationThe OE is a bit cumbersome and the question might be attacked in a clever way. Boil down the fraction, we ca eliminate 39 at the denominator because 3*13=39 so indeed we will end up with \(\frac{x=2*4*5*7*11}{y}\).

Now. the stem says that X is an integer and to obtain an integer we should find a number for Y that has the same prime factors of the numerator

\(x= \frac{2^3 * 5*7*11}{y}\)

Looking at the answer choice the only number that satisfies our condition is \(28 = 2^2*7\). The other answer choices lack prime numbers that satisfy our condition.

For instance, 15=3*5 but 3 is not in our numerator.

The correct option is

B
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