The colors red and yellow are favored by fast food restaurants because they: a. indicate trustworthiness b. convey wisdom c. induce calm d. cause agitation

C. Induce calm

Fast food restaurants often use the colors red and yellow as a marketing strategy to lure in more customers and increase sales. The colors yellow and red have a subconscious psychological effect on us, making us feel happy, intrigued and calm. These feelings are likely to stimulate our appetite and thus, increase sales and profits at fast food restaurants.