The correct option is A A description of a thesis is offered, specific cases are considered, and an evaluation is given.
The whole passage structure is as follows:
Pocock’s Civic humanism theory is described. Then the author presents the example of “eighteenth-century English political” where this theory holds true.
Then he presents the example of “late-eighteenth-century United States” where this theory does not hold true.
Finally the author gives his evaluation of civic humanism theory in the last line of the passage.
So only (A) option matches the structure of the passage properly.