The aided big business by reducing the power of labor unions in the united states. specifically, it meant that unions could no longer demand that only union members be hired by businesses, nor engage in secondary boycotts of businesses selling or handling nonunion goods
.a. the national interstate and defense highways act of 1956
b. the taft-hartley act of 1947
c. the servicemen's readjustment act of 1944
d. the william levitt act of 1958

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation:

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b