Reduction of a proper fraction $\frac{f(x)}{g(x)}$ into a sum of partial fractions depends upon the factorization of . . . . . . .

  • A
    $f(x)$ alone
  • B
    $g(x)$ alone
  • C
    both $f(x)$ and $g(x)$
  • D
    factors of $f(x)$ and $g(x)$

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