In the late 1960s, Mao Zedong established diplomatic relations with the United States since the Soviet Union and China were at odds. In response, the Soviet Union became better acquainted with America. In a paragraph of at least 125
words, explain why the Soviet leader would suddenly become better "friends with the United States just because China
had done so.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: