Which algebraic expression is a polynomial with a degree of 4 ?
A
2 x to the 4th power minus 6 x to the 4th power plus 14 over xB
x to the 5th power minus 6 x to the 4th power plus 14 x cubed plus x squaredC
9 x to the 4th power minus x cubed minus x over 5D
5 x to the 4th power plus square root of 4 x