To Convert from ____ to ____, One Must Multiply by ____

To convert from ____ to ____, one must multiply by ____.

A) parts per million; parts per billion; 10^-3
B) parts per thousand; parts per billion; 10³
C) parts per million; weight percent; 10^-4
D) parts per billion; parts per trillion; 10⁶
E) parts per thousand; weight percent; 10