Due to his efforts on behalf of Missouri Henry Clay became known as the "Great Debater." the "Leader of Congress." the "Great Compromiser." the "Slavery Supporter."

## Step 1<br />The problem is a multiple-choice question about the historical figure, Henry Clay. The question asks us to identify the nickname that best represents his efforts on behalf of Missouri.<br />## Step 2<br />Henry Clay was a prominent American statesman and a leading figure in the United States Senate. He was known for his role in the Missouri Compromise, a significant event in the history of the United States.<br />## Step 3<br />The Missouri Compromise was a series of measures passed by Congress in 1820 to deal with the issue of slavery in the territories. The compromise allowed Missouri to enter the Union as a slave state and Maine as a free state, maintaining the balance of power in the Senate.<br />## Step 4<br />Given this historical context, the nickname that best represents Henry Clay's efforts on behalf of Missouri is "the Great Compromiser". This nickname reflects his role in the Missouri Compromise and his ability to negotiate and compromise on the issue of slavery.