Which polynomial correctly combines the like terms and expresses the given polynomial in standard form? 9xy3 – 4y4 – 10x2y2 + x3y + 3x4 + 2x2y2 – 9y4

3x4 – 8x2y2 + x3y + 9xy3 – 13y4
3, x, 4, – 8, x, 2, y, 2, + , x, 3, y, + 9, xy, 3, – 13, y, 4

–13y4 + 3x4 – 8x2y2 + x3y + 9xy3
–13, y, 4, + 3, x, 4, – 8, x, 2, y, 2, + , x, 3, y, + 9, xy, 3

–13y4 + x3y – 8x2y2 + 9xy3 + 3x4
–13, y, 4, + , x, 3, y, – 8, x, 2, y, 2, + 9, xy, 3, + 3, x, 4

3x4 + x3y – 8x2y2 + 9xy3 – 13y4