Slavery was defended for many reasons in the 1800s. Which opinion best explains why some citizens of free states might support slavery? (1 point) a Slaves were needed to build railroads and new cities in the west. b Escaped slaves should not be protected by the governments of free states. c New states should be able to choose whether slavery would be legal or not. d Southern agriculture was too important to the U. S. economy to lose slave labor.

D, Southern agriculture was too important to the U.S. economy to lose slave labor.

Explanation:

The South back then heavily supported the US economy with their cash crops. Without slaves doing this free labor, the economy would almost undoubtely decline significantly.

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