In the context of this statement, the word seminal include option C: A religious document.
Martin Luther King, Jr., wrote the letter in 1963 while in jail for his role in protests in Birmingham against racial discrimination.
In the letter, King explained his philosophy of non-violent resistance, and appealed to other Christian leaders to see this as an ethical issue that needed their attention.
He asserted that if we truly act on our religious convictions, we will apply those convictions to matters of justice in our relationships with our fellow citizens.
Therefore, correct option is C.
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