The value of $$\frac{\left(a-b\right)^{3} + \left(b-c\right)^{3} + \left(c-a\right)^{3}}{\left(a^{2}-b^{2}\right)^{3} + \left(b^{2}-c^{2}\right)^{3} + \left(c^{2}-a^{2}\right)^{3}}$$ is equal to:

A

ab + bc + ca

B

0

C

1

D

$$\frac{1}{\left(a+b\right)\left(b+c\right)\left(c+a\right)}$$