Why did america expand into these new territories?

They needed to find more land for more opportunities for factories and trading. They wanted to try to gain a better economy. With their power, they had a hold of other paces such as Hawaii, Cuba, Puerto Rico, Guam, and the Philippines.

I hope this helps you.

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: