You like trying to understand complex issues

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.

Why is the color green callled green?

How do you do this? i’ve marked the correct answer but i can’t seem to calculate