Answer :
The correct answer is B.
St. Augustine was a Christian theologian and philosopher. He reflected on peace and justice, and his teachings are still used in the modern world.
Therefore, by quoting such an important figure in the philosophy sphere, and showing that he shared the same point of view as he does now, King makes his argument stronger and increases his credibility.
The credibility of a passage is boosted when references are made about notable individuals. The reference of St. Augustine adds to the credibility of Dr. King's argument about just and unjust laws mainly by;
- B. Proving to his audience that other trusted people from history agree with him
In his reference to St. Augustine, Dr. King concurred with the saint who said that an "unjust law is no law at all".
Thus, he was indicating that other notable people agreed with his submission that the morality of a law should be considered before obeying it.
Therefore, sentence B shows Dr. King's reason for referencing St. Augustine.
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