Comparing how many dollars it takes you to run your car each year to annual earnings on a job insteadof keeping track of costs in terms of gallons of gasoline and quarts of oil represents the use of money as:. a. means of payment. b. unit of account. c. store of purchasing power. d. form of plastic money.

B

Explanation:

Money has several functions, one of its principal function is using it as unit of account. By comparing the amount in dollars spent on running a car yearly to annual earnings instead of keeping track in terms of gasoline cost and quarts of oil shows that money has been used as a unit of account.

This means that the amount of gasoline gallons bought and quarts of oil has been essentially replaced by the cost of these purchases and hence avail is the power to use money as a unit of account

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.