If a, b, c are real and a + b + c = 0, then $$x^{a^2b^{-1}c^{-1}}.x^{a^{-1}b^{2}c^{-1}}.x^{a^{-1}b^{-1}c^{2}} =$$

A

1

B

$$x^2$$

C

$$x^3$$

D

$$x^{-2}$$