Plzzz ! when the polynomial p(x) = x3 + 3x2 -2ax + 3, where a is a constant, is divided by x2 + 1 we get a remainder equal to -5x. find a. will give brainlist to correct answer

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Ithink it is b and d