$$\left[2\frac{1}{4}\div\frac{3}{4}\right] + \left[5\frac{2}{3}\div\frac{17}{13}\right] - \left[3\frac{1}{3}\times\frac{6}{5}\right] + \left[17.98\div6.2\right] + \left[1.25\div0.5\right]=?$$

A

3.9

B

69.2

C

8.7

D

4.5