The best answer to the question about why Huey P. Long's "Share Our Wealth" movement appealed to many Americans during the 1930s is:
C. Many Americans were concerned about the state of the economy.
During the 1930s, the Great Depression had caused widespread economic hardship, high unemployment rates, and significant poverty. Long's movement, which proposed wealth redistribution to provide financial security and opportunities for the poor and middle class, resonated with those who were struggling economically.