In Year 1, Y=2,000, K=1,700, N=70, and, in Year 2, Y=2,100, K=1785, and N=75. Suppose that the production function is given by Y=AK0-25N0-75. Between Year 1 and Year 2 the total factor productivity of this economy changed by A. -1.5%. B. 5.0%. C. 5.5%. D. 10.0% E. 12.7%