Which is equal to 5x(x^{4} - 3x^{3} + 2x - 4)?

A: 5x^{4} - 15x^{3} + 10x - 20

B: 5x^{5} - 15x^{4} + 10x^{2} - 20x

C: 5x^{5} - 3x^{3} + 2x - 4x

D: 16x^{5} - 8x^{4} + 7x^{2} - 9x

B

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