Classical economist david hume observed that as the money supply expanded after gold discoveries a. it took time for prices to rise; in the meantime output was higher. b. it took time for prices to rise; in the meantime output was lower. c. prices and output both increased immediately. d. prices increased immediately while output remained unchanged.

Option A

Explanation: As per the famous economist David Hume, the classical theory of economics does not work when it comes to short run period.

As per his opinion, there was  a expansion a money supply after gold discoveries but prices climbed up after a certain time, resulting in more employment and higher production in an economy.

Thus, we can conclude that Option A is correct .

the answer is d i just took the test (provides the number of allowances an employee has claimed.)

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.