Please someone help.

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.

Who wants brainliest? get this answer correct and ill do so : ) after adjusting your seat, your should be as close as possible to the backrest. a. hands b. arms c. bottom d. legs

Gneiss is formed. the mineral grains in which granite are flattened under pressure