Solve $$\frac{\left(6.9\right)^{3} + \left(2.7\right)^{3} + \left(5.8\right)^{3} - 3 \times 6.9 \times 2.7 \times 5.8}{\left(6.9\right)^{2} + \left(2.7\right)^{2} + \left(5.2\right)^{2} - \left(6.9\right)\left(2.7\right) - \left(2.7\right)\left(5.8\right) - \left(5.8\right)\left(6.9\right)}$$

A

15.1

B

15.3

C

15.2

D

15.4