Sweet 17

Let xx be any positive integer greater than 171717^{17} , which is not divisible by 1717.

Then which of the following is always true :

A: either x81x^8-1, or x8+1x^8+1, is divisible by 1717.

B: either x91x^9-1, or x9+1x^9+1, is divisible by 1717.

C: either x81x^8-1, or x9+1x^9+1, is divisible by 1717.

D: either x8+1x^8+1, or x91x^9-1, is divisible by 1717.

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