When did slavery start in American

1930
1620
1776
1850

slavery first began in 1776

Explanation:

Slavery existed in the United States from its founding in 1776 until the passage of the Thirteenth Amendment in 1865. Slavery lasted in about half of U.S. states until 1865. As an economic system, slavery was largely replaced by sharecropping and convict leasing.

hope it's helpful

because he is that the right

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.