The marginal propensity to consume out of income

All the following statements about the Federal Reserve are true EXCEPT the fact that it ________

A) is a public authority B) regulates a nation's depository institutions C) accepts checking deposits from the nation's residents D) controls the quantity of money

A concentration ratio gives

A) the average size of the firms in an industry. B) the total sales of four or eight of the mid-sized firms in the industry. C) the percentage of all sales contributed by the four or eight largest firms in the industry. D) the sales of the four largest firms in the industry divided by the sales of the eight largest firms in the industry.