Answer:
A. As the highest tax rate was reduced in the 1920s, the economy grew.
Step-by-step explanation:
from the graph, it can be seen that decrease in tax rate consequently decrease in tax paid thereby increasing economy.
tax reduction helps to increase the economy growth by boosting bussiness demand by increasing firm after tax cash;
its increases workers take home pay thereby reducing unemployment and create a good standard of living for the people of the country.