The Following Sentences Form a Passage

The following sentences form a passage. For each sentence, select "correct" if the sentence is punctuated correctly, "fragment" if it is a fragment, "run-on" if it is a run-on, and "comma splice" if it is a comma splice. Then a television program on PBS changed his life the seventh grader watched in amazement as students in a well-equipped machine shop built their own robots.

A) correct
B) fragment
C) run-on
D) comma splice