16. Which of the following statements regarding "center of gravity" and "center of buoyancy" is true? a) The Center of Buoyancy (CB) refers to the centroid of an object's weight b) The Center of Gravity (CG) refers to the centroid of the displaced volume c) For an object to be stable, the CB should be above the CG d) For an object to be stable, the CG should be above the CB e) None of the above