Aresource has value, and people are willing to pay for it most likely because the resource is

A resource has value, and people are willing to pay for it most likely because the resource is needed by the people. Sources such as food, habitat and clothing are the most important resource a person can have and these are needs. It will also depend on the era the person is living.

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:

it provided for equal trade rights among nations in china.