Suppose G is the generating function for the sequence 4, 7, 10, 13, 16, 19, , the find a generating function (in terms of G) for the sequence of differences between terms.

• A. (1 x)G 4/x
• B. (1 x)G 4/x³
• C. (1 x)G+6/x
• D. (1 x)G x²