In an essay, the author states his opinion that it was an idea, not a place, that gave birth to the United States. Which of the following is a FACT that he could use to support his opinion?

c. when events took place.

Explanation:

The headings follow each other sequentially in a Chronological order starting from 1968 then to 1986 and 1996 and then to 1997.

When something is arranged chronologically, it means it is arranged in order of when the event occurred and that is what has happened in the arrangement of these headings by John Diconsiglio.