________ is a motivation theory proposing that individuals will compare their circumstances to those of others and that such comparisons may motivate certain kinds of behavior

___________ exists when a large number of firms produce goods that are similar but are perceived by buyers as being different.

A. Perfect competition B. Monopolistic competition C. Oligopoly D. A monopoly

A(n) ________ is a group of firms offering a product or class of products that are close substitutes for one another

A) community B) task force C) industry D) focus group E) umbrella brand