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Let (1+x+x^(2))^(9)=a(0)+a(1)x+a(2)x^(2)...

Let `(1+x+x^(2))^(9)=a_(0)+a_(1)x+a_(2)x^(2)+.....+a_(18)x^(18)`. Then

A

`a_(0)+a_(2)+....+a_(18)=a_(1)+a_(3)+......+a_(17)`

B

`a_(0)+a_(2)+......a_(18)` is even

C

`a_(0)+a_(2)+......a_(18)` is divisible by 9

D

`a_(0)+a_(2)+......a_(18)` is divisible by 3 but not by 9

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