Which economic organization would have the BIGGEST role in this part of the world?

Because the inflation rate is so high Wanda refuses to carry cash. Even though it is a bother, she now goes to the ATM twice as often to get the cash she needs. Wanda's actions are an example of the

A) tax distorting costs of inflation. B) uncertainty costs of inflation. C) tax costs of inflation. D) shoe-leather costs of inflation. E) confusion costs of inflation.

The four-firm concentration ratio is the percentage of ________ accounted for by the four largest firms in an industry

A) profit B) supply C) total revenue D) total cost E) marginal cost