1. Two accounts designated fund XX and fund YY are set up now to receive future contributions. Money in either account will be credited with simple interest and at an annual rate rr. Only one contribution of $13,000 will be made to fund XX will be made 2.5 years from now. A series of three contributions will be made to fund YY. The first contribution will be $5,000 and will be made 1 year from now. The second contribution will be $4,000 and will be made 2 years from now. The third contribution will be $3,000 and will be made 3 years from now. At the end of 3 years (just after the third contribution to fund YY will be made), the accumulated values in the two accounts will be identical. In which of the following ranges does rr lie?

Possible Answers: A:< 12.5%. B: 12.5% but < 15%. C: 15% but < 17.5%. D: 17.5% but < 20%. E: 20%