Option A. In his "Letter from Birmingham Jail" Martin Luther King Jr. refers to Jesus, Paul the Apostle, Thomas Jefferson and Abraham Lincoln as extremists.
Explanation:
On April 16th, 1963 Martin Luther King Jr wrote an open letter from Biringham Jail as a response to the critics him and his non-violent resistance to racism movement received. Luther King Jr quotes different important figures of history and religion such as Paul the Apostle, Thomas Jefferson, Jesus and Abraham Lincoln as he exclaims that all of these figures were considered to be "extremists", as his critics are definying hm as well, but in stead of taking that word as an insult he decided to take it with pride. Marti Luther Kin Jr then procedes to say that him, as well as the aformentioned men, believes is his duty to spread the word of justice and love not only in his city but around the country.
If it is a definite noun, that is you are aware of it beforehand, you use the. If it is indefinite and begins with a vowel, use an. If it's indefinite and begins with a consonant, choose a.
