After 250 BCE, Hellenistic kingdoms faced danger because they were no longer able to pay for

A. building projects

B. public education

C. standing armies

D. public festivals

Please select the best answer from the choices provided

Ο Α.

OB

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A. Building projects. Just took the test.

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: