Let t_n equal the integer closest to \sqrt n.
For example, t_1=t_2=1 since \sqrt1=1 and \sqrt2\approx1.41 and t_3=2 since \sqrt3\approx1.73.
The sum \displaystyle\frac{1}{t_1}+\frac{1}{t_2}+\frac{1}{t_3}+\frac{1}{t_4}+\cdots+\frac{1}{t_{2008}}+\frac{1}{t_{2009}}+\frac{1}{t_{2010}} equals
Answer Choices
A. 88\frac16
B. 88\frac12
C. 88\frac23
D. 88\frac13
E. 90