Which was the largest and most important issue that continued to surface during the era of "manifest destiny"?
select one:
a. if labor unions could form in the territories.
b. if states would allow women the right to citizenship.
c. if native americans would be granted the right to vote.
d. if slavery would extend into the new areas that were settled.

Expansionism was the most important issue prevailing during the era of the Manifest Destiny. There was a decisive question of expansion of slavery. Whether there'll be slavery in the new areas that were settled.

The northerners and the southerners defined the Manifest Destiny in different ways. The Manifest Destiny is concerned with the increase of capitalism and democracy around the nation. Hence Expansion of slavery was the issue during Manifest Destiny era.

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