A. primary and secondary sources are the same thing. b. primary sources are the notes a reporter takes during an interview; secondary sources are the notes a student takes while doing research. c. primary sources are first-hand accounts of an event or experience; secondary sources are the interpretations or analysis of those first-hand accounts, events, or experiences. d. primary sources are the news reporters who first report on a breaking story; secondary sources are the eyewitnesses of the event.

the anwser can not be a its not b or d so the anwser is c.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."