What was the greatest concern of those opposing nullification during the crisis in the 1830s?
The greatest concern of those opposing nullification during the crisis in the 1830s was that South Carolina would become much too powerful and impose slavery on other states.
This was a legitimate concern as it was very bad at the time if a Southern state had so much power.
Answer:
that states would leave the Union and gravely weaken it
Explanation:
a). that John C. Calhoun would become president
b). that states would leave the Union and gravely weaken it
c). that the United States would fail to collect tariffs, causing a financial strain on the economy
d). that South Carolina would become much too powerful and impose slavery on other states