What is the tight money policy?
a. interest rate is high but money in circulation is low
c. interest rates are low and money in circulation is low
b. interest rates is high but money in circulation is high
d. interest rates are low and money in circulation is high

A tight money policy is when for example the Federal Reserve System ,seeks to restrict credit and raises interest rates

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.