Since the question mentions a bolded phrase, we can assume it is about "after their competition."
Answer:
The function the phrase plays in the sentence is: B. adverb.
Explanation:
Adverbial phrases are phrases in a sentence that function just like an adverb would, telling us the when, where, how, or why an action happens. In the sentence we are analyzing here, the phrase "after their competition" indicates WHEN the action will occur. Therefore, it functions as an adverb of time. It's as if we are asking the sentence a question: When will the cheerleaders enjoy a long break? After their competition.
