The following passage is an excerpt from John Lewis’s speech…

The following passage is an excerpt from John Lewis’s speech at the March on Washington:To those who have said, “Be patient and wait,” we have long said that we cannot be patient.  We do not want our freedom gradually, but we want to be free now!  We are tired.  We are tired of being beaten by policemen.  We are tired of seeing our people locked up in jail over and over again.  And then you holler, “Be patient.”  How long can we be patient?  We want our freedom and we want it now.   Which choice best describes the overall structure of the above excerpt?