2. In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is (A) the percentage of carbohydrates in the component. (B) the number of enzymes in the fraction. (C) the presence or absence of lipids in the component. (D) the size and weight of the component. (E) the relative solubility of the component.