Before the Columbian Exchange, which was only in the Old World?

When Christopher Columbus and his men came to the Americas over 500 years ago, they brought horses, chickens, and wheat bread from Europe. The Native Americans had never seen any of those things before. The Europeans had never seen the potatoes, peanuts, tomatoes, cocoa, or corn grown by the Native Americans.

answer; /// i believe that they became successful farmers; ///////////////

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.