Answer and explanation:
The interior story, as the name suggests, is the story within another story. In this passage, the frame story is the speaker, Kevin, receiving a phone call from Matt, a friend he hasn't seen in almost ten years. The frame story is the one that involves the interior story. The interior story begins with the line '"Kevin, come inside!" my mother called.' This line separates the current moment from the moment the speaker is remembering - he and Matt playing outside; Kevin's mother calling him in. There is another story being told now, one about the past. But it is told as if it were happening at this moment. We have, from this moment on, an interior story.
I believe the answer would be
B. diverse people contribute to the country's identity
This is a compound sentence containing 2 independent clauses separated by a conjunction.
