Why was US acquisition of the Louisiana Territory significant? (A)It was the first US annexation of an independent nation.
(B)It nearly doubled the size of the United States.
(C)It was the first US territory acquired through war.
(D)It extended the United States to the West Coast.

Jackson  said nullification 'means insurrection and war,' and called it a treasonous attack on america. the second aspect of the  force bill  was the passing in congress of a lower tariff in 1833. this was offered as a compromise to avoid conflict with south carolina, and to attempt to defuse the tense situation.source google

Well since there aren't any choices i dont know if this is right but nationalism played an important role in the unification of both italy and germany i do believe