Final answer:
Valid sources for online research are the National Archives and a college history professor's website, while a blog without credentials cannot be considered reliable.
Explanation:
Authority: The National Archives is a reputable and valid source due to its authoritative nature as a government institution.
Currency: A college history professor's website about her area of expertise can be a valid source if it is updated regularly to maintain currency.
Relevance/Intended Audience: A blog by someone with no biography or credentials listed may not be a valid source due to the lack of authority and credibility.
Learn more about evaluating online sources here:
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