Which of the following is a contribution that the ancient Chinese civilizations shared with the ancient Incas? both used marble as a building material
both built and maintained a network of roads
both developed vaccinations against diseases
both raised silkworms to produce silk

THE answer would be c

Explanation: GOOD LUCK

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: