(Brainliest Question)

What lead to the break-up of the Soviet Union?

a. Debt because of reparations after WWII

b. The Treaty of Versailles

c. Satellite countries declaring independence

d. Involvement in world conflict

B, the u.s wanted money and due to hyper inflation in germany the british and french were unable to pay the u.s.

Explanation:

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: