Positive feedback loops are caused: A. when a small physiological change leads to an amplified change in the same direction. B. when the body responds to cold temperatures by shivering and constricting blood vessels near the skins surface. C. when a physiological change in one direction leads to a change in the opposite direction. D. when physiological changes no longer occur in the cell.

Which of these best describes the function of a "super pac"? a)create bi-partisan legislation that can become law b)organization meant to reign-in spending of political candidates during election cycles c)promote the interests of supreme court justices without breaking specific tampering laws d)raise funds through donations from corporations or individuals to support or oppose specific political candidates