Which answer best explains how slavery was an issue in relation to the Mexican-American War?

The spread in slave trading to Asia caused disagreements amongst Americans.

There was a great deal of disagreement over whether slaves should fight in the war.

The United States and Mexico disagreed over who had ownership of slaves that lived in Texas.

Americans disagreed over whether slavery should be allowed in the land gained during the war.

Question

Which answer best explains how slavery was an issue in relation to the Mexican-American War?
 
The spread in slave trading to Asia caused disagreements amongst Americans. 

There was a great deal of disagreement over whether slaves should fight in the war.
 
The United States and Mexico disagreed over who had ownership of slaves that lived in Texas.
 
Americans disagreed over whether slavery should be allowed in the land gained during the war.

anonymous · Answer

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