Read the excerpt from Dr. Martin Luther King’s “Letter from Birmingham Jail.”Frankly, I have yet to engage in a direct action campaign that was "well timed" in the view of those who have not suffered unduly from the disease of segregation.What is the author’s purpose for including this sentence?
A
to establish the suffering experienced under segregationB
to define the concept of a direct action campaignC
to criticize the public officials who endorse segregationD
to explain his unwillingness to postpone his efforts