Under roosevelt’s leadership, the untied states sent troops to occupy?

To occupy Cuba.

Explanation:

When Roosevelt was president, back then in September 1906, the United States sent troops to occupy Cuba and this situation and event is also known as the ''Pacification of Cuba''. The president Roosevelt wanted to see what are economic issues in Cuba and he wanted to take care of them because of the United States citizens protection because they were living on that island.

He also wanted free elections and to prevent internal riots. The troops left in February after the elections in January.

c. the dred scott v. sandford case,

yes.

explanation:

because it let the japanese know who had the upper hand in the war.