The theory that there are no predictable trends in securities prices that can be used to "get rich quick" is the

Because of the flaws of the concentration ratio as a measure of the extent of competition in an industry, some economists prefer another measure of competition, the Herfindahl-Hirschman Index

Indicate whether the statement is true or false

Consumer surplus measures

A) the extra amount that a consumer must pay to obtain a marginal unit of a good or service. B) the excess demand that consumers have when a price ceiling holds prices below their equilibrium. C) the benefit that consumers receive from a good or service beyond what they pay. D) gain or loss to consumers from price fixing.