What was one of Bryan's major campaign talking points

One of Bryan's major campaign talking points was his speech on bimetallism or "free silver".

Explanation:

William Jennings Bryan was a Democratic Congressman from Nebraska who unsuccessfully attempted to become the President of the United States during the election of 1896. He was a silent and minor character in the party, who became famous for his oratory skills, more because of his "Cross of Gold" speech.

One of his major talking points was to support "bimetallism", or "free silver" that will enable the nation to prosper without harming the people. His famous quote "you shall not crucify mankind upon a cross of gold" shows his opposition to the government's systems or laws which he greatly wanted to change according to his own standards and beliefs. According to his plan, the country should use silver to back the farmers and their products so that that'll help ease their debt burden.  

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

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.