The value of$$ \left(\frac{x^a}{x^b}\right)^{(a^2 + ab + b^2)} \left(\frac{x^b}{x^c}\right)^{(b^2 + bc + c^2)} \left(\frac{x^c}{x^a}\right)^{(c^2 + ca + a^2)}$$ is:

A

-1

B

$$X^{abc}$$

C

1

D

$$X^{(a+b+c)}$$