What word or phrase is modified by the prepositional phrase in the sentence below?

Chris is holding his birthday party at a bowling alley because everyone can bowl and play video games.
A.
video games
B.
birthday party
C.
bowl
D.
Chris

B. birthday party

The prepositional phrase "at a bowling alley" modifies the word "birthday party." So the correct answer is B. birthday party.

The prepositional phrase in the sentence is "at a bowling alley". To determine what word or phrase it modifies, we can ask the question "Where is Chris holding his birthday party?" The answer to this question is "at a bowling alley", so the prepositional phrase modifies the phrase "birthday party". Therefore, the correct answer is B. "birthday party".