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"If "f(x)=(x-1)^(4)(x-2)^(3)(x-3)^(2)(x-...

`"If "f(x)=(x-1)^(4)(x-2)^(3)(x-3)^(2)(x-4),` then the value of `f'''(1)+f''(2)+f'(3)+f'(4)` equals

A

`0`

B

`1`

C

`2`

D

`6`

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