Question

a crisis erupted in the 1830s over nullification. what was nullification? the effect of the supreme court declaring laws to be unconstitutional the idea that a state could declare federal legislation invalid, prevent its enforcement, and possibly secede the notion that state delegations could change their votes in congress within the 10 days that the president had to veto legislation the result of a presidential veto that congress failed to override

Explanation:

Nullification in the 1830s was the idea that a state could declare federal legislation invalid, stop its enforcement, and potentially secede. It was a concept related to states - rights and the balance of power between states and the federal government. The other options describe different legal and political processes such as judicial review (Supreme - Court declaring laws unconstitutional), vote - changing in Congress, and presidential veto outcomes, which are not nullification.

Answer:

the idea that a state could declare federal legislation invalid, prevent its enforcement, and possibly secede