Which of these resulted from the seven voyages of Yongle Emperor's treasure fleet and eventually led to the Chinese limiting trade?

Idon't know the answer is

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