Simplify the following polynomial expression. 5x^4-9x^3+7x-1)+(-8x^4+4x^2-3x+2)-(-4x^3+5x-1)(2x-7) A.  5x^4-37x^3-6x^2+41x-6
B.  11x^4-21x^3+14x^2+33x-8
C.  11x^4-21x^3+14x^2+33x-6
D.  5x^4-37x^3-6x^2+41x-8  

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