Select the correct answer. Select the number of the punctuation error.
"Have you ever been in the hospital before?u2 asked, 3 the doctor when he finished his examination.
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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:

c) troops march forward in close formation against newer, more accurate weapons

ha deadpool ofc

explanation: