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. As a child, he played for hours with Legos and cardboard boxes, like many future engineers, he wanted to understand how things worked.

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