Which polynomial is written in descending order?
9 _ 3x + 4x2
_3x + 9 + 4x2
4x2 _ 3x + 9
4x2 + 9 _ 3x
9 _ 3x + 4x2
_3x + 9 + 4x2
4x2 _ 3x + 9
4x2 + 9 _ 3x