Answer: the correct answer is but patriotism is partly taking pride in this
unlikely ability to throw all of us together in a country that across its length and breadth is as different as a dozen countries, and still be able to call it by one name
Explanation: the author remarks the idea that America is a country in which many races and cultures coexist and the force that unites the country is patriotism.
I'm pretty sure it is C. The reasons being that the poem is called "We Wear the Mask". That means that they are showing one thing on the outside, but are saying something different on the inside. Like they are pretending. C makes the most sense because the passage states that they smile on the outside but their souls are crying.