Which polynomial correctly combines the like terms and puts the given polynomial in standard form?

1/3x + 8x^4 - 2/3x^2 - x

A. 8x^4 - 1/3x^2 + 2/3x

B. 8x^4 + 2/3x^2 + 2/3x

C. 8x^4 - 2/3x^2 - 2/3x

D. 8x^4 - 2/3x^2 - x