The 3rd-person omniscient narrative voice is most likely being employed here. The writing is in the 3rd person, and the narrator apparently can give access to Chad's thoughts, which suggests that the narrator is writing from a perspective that knows everything related to the story.
Answer would be C I'm pretty sure.
An Adjectival Phrase - a group of words headed by an adjective that modifies a noun.
An Adjective - a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it.
A Noun - a word (other than a pronoun) used to identify any of a class of people, places, or things
Explanation:
C
it shows the antecedent as Sam