If X and Y are sets, is it always true that n(XminusY)equalsn(X)minusn(Y)? Explain. Question content area bottom Part 1 Choose the correct answer below. A. The statement is not always true because the number of elements of X must always equal the number of elements of Y. B. The statement is not always true. In the diagram to the right, n(X)equals5 and n(Y)equals7, n left parenthesis Upper X minus Upper Y right parenthesis equals 2, and n left parenthesis Upper X right parenthesis minus n left parenthesis Upper Y right parenthesis equals negative 2. Upper X Upper Y 2 3 4 C. The statement is always true because the number of elements in the difference of two sets is the same as the number of elements in the first set minus the number of elements of the second set. D. The statement is always true. In the diagram to the right, n(X)equals4 and n(Y)equals2, n left parenthesis Upper X minus Upper Y right parenthesis equals 2, and n left parenthesis Upper X right parenthesis minus n left parenthesis Upper Y right parenthesis equals 2