- <u>Primary</u><u> </u><u>S</u><u>ource</u><u>:</u><u>-</u><u> </u><em>When</em><em> </em><em>the</em><em> </em><em>information</em><em> </em><em>is</em><em> </em><em>found</em><em> </em><em>by</em><em> </em><em>a</em><em> </em><em>person</em><em> </em><em>himself</em><em> </em><em>and</em><em> </em><em>used</em><em> </em><em>it</em><em>,</em><em> </em><em>It</em><em> </em><em>is</em><em> </em><em>known</em><em> </em><em>as</em><em> </em><em>primary</em><em> </em><em>source</em><em>.</em>
- <u>Secondary</u><u> </u><u>Source</u><u>:</u><u>-</u><u> </u><em>The</em><em> </em><em>type</em><em> </em><em>of</em><em> </em><em>information</em><em> </em><em>whoch</em><em> </em><em>we</em><em> </em><em>receive</em><em> </em><em>from</em><em> </em><em>other</em><em> </em><em>sources</em><em> </em><em>is</em><em> </em><em>called</em><em> </em><em>Secondary</em><em> </em><em>source</em><em>.</em>

A thank you letter from a customer Primary source
A magazine about local companies Secondary source
A business report about sales campaigns Primary source
A newspaper article Secondary source
a person working at the same business Secondary source
a popular book about management styles Primary Source
How can you answer this one without the 2 sentences
Answer:
to prove that newly-freed African-Americans were making social and economic progress
Answer:
a. et al.
Explanation:
In any text citations, specially the name of the authors is a must. Though the citations may differ in their styles for different ways of including the names of the authors, the most common form of citation is to include the last name of the author, followed by the first and middle names, if any.
In cases of numerous authors, in-text citations becomes a bit more complicated. The accepted way of putting an in-text citation for a text with numerous writers is to put the name of the first author followed by the term "<em>et al</em>', which, in Latin, means "<em>and others</em>". This way, it makes it more simpler and easier to cite the referenced text without missing the important details.
Its gonna be b trust me i seen this before on my test