Answer:
D. There should be no exceptions for freedom and civil rights being equally provided to all.
Explanation:
I'm not entirely sure how to explain an answer like this, but I will try my best.
For A, there is no indication in the address that this is what Kennedy is referring to. Definitively, Kennedy's "except"s are not referring to this. A is incorrect.
For B, again, there is no indication that Kennedy's "except"s are referring to an argument's exceptions. The speech is about racial differences, and inequality. B is incorrect.
For C, this, in theory, could be what the speech is about—however, Kennedy is talking more about how those who have been excepted from freedom and equality, for instance, should be included in that category. C is incorrect.
For D, this answer is most accurate. As mentioned above, Kennedy is arguing for all classes, categories, etc, of people to be included in the infamous phrase from the Constitution. That makes D correct.