According to the "Address in Independence Hall" by Abraham Lincoln, it is a secondary source because it discusses important events from the time period.
A secondary source is one in which events which have already happened are being referenced and used.
Some examples of a secondary source include:
According to the speech made by Abraham Lincoln in the Independence Hall, he gave his reasons why he would not allow secession from the South and said the government would try to avoid violence but would be forced to act in self defense.
This is a historical event that shows the things that happened in American history.
Therefore, the correct answer is option C
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