The value of $$42 \div 10 - \left(\frac{7}{4} \times \frac{1}{3}\right) of \frac{6}{5} + \frac{16}{3} \times \frac{9}{10} - \left(\frac{1}{6} \div \frac{1}{36}\right)$$ is:

A

1.7

B

2.9

C

1.5

D

2.3