Which polynomials are in standard form? Choose all answers that apply: Choose all answers that apply: (Choice A) A 5-2x5−2x5, minus, 2, x (Choice B) B x^4-8x^2-16x 4 −8x 2 −16x, start superscript, 4, end superscript, minus, 8, x, squared, minus, 16 (Choice C) C 5x^3+4x^4-3x+15x 3 +4x 4 −3x+15, x, cubed, plus, 4, x, start superscript, 4, end superscript, minus, 3, x, plus, 1 (Choice D) D None of the above