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Answer: to establish his professional credentials.
By including this statement in the text, King wants to establish his professional credentials in order to show that he is a credible speaker. This is known as an appeal to ethos. King wants to clarify that he is not a common man who might not know what he is talking about. Instead, he wants to show that he has experience in leadership, and that he is a member of well-established groups that support his views.
Martin Luther King Jr. had written a letter while he was imprisoned in the Birmingham City central jail. The letter was written with a purpose of giving a new direction to the country and motivate for progress.
The correct statement is that Martin Luther King's purpose for including such a sentence was to establish his professional credentials. So, the option is C.
What was the purpose of "Letter from Birmingham Jail"?
Martin Luther King was being held captivated in the Birmingham Jail. During his term of imprisonment, he had written a letter to convey his message to his fellow countrymen.
The only reason why King added his designation about presidency of the Southern Christian Leadership Conference was to establish the credibility of his profession.
This also had helped give an impression in the minds of readers that the letter was written by a man who possesses due diligence.
Hence, the correct option is C that King's purpose for adding a sentence about his presidency in the letter from Birmingham jail was to establish his professional credentials.
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