PLZ ANSWER FREE POINTS JUST THE OPTION TELL PLS

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.

Explain the popular saying "we are made of stardust. how are we made of stardust? use scientific vocab.

Which allows college students to work part time jobs to pay for educational expenses ?