Hoover kept the federal government out of the hands in the economy that did not work well during a major depression. He included in his policies the voluntary action by business and labor but did not work as well. Eventually, Hoover came out of hand of solution for the depression and unemployment continued to soar in the country.
The answer to your question is d
It was '<span>military defeats, rebellions, and economic troubles' that </span>indicated that the Tang Dynasty had lost the Mandate of Heaven.
The mandate Heavens was the believes in China that the Heaven gave kings the policy to rule according to their wisdom and knowledge.
<span>B. During the period of Viking, Magyar, and Muslim invasions</span>
C and false is correct answer