Answer:
C. for the Sunday brunch
Step-by-step explanation:
The complete prepositional phrase is "for the Sunday brunch." This phrase includes the preposition "for" and the object of the preposition "Sunday brunch."
Option A, "we need," is not a prepositional phrase because it does not include a preposition.
Option B, "milk, cheese, and eggs," is also not a prepositional phrase because it does not include a preposition.
Option C, "for the Sunday brunch," is the correct answer because it is a complete prepositional phrase.
A prepositional phrase is a group of words that begins with a preposition and ends with a noun or pronoun, which is called the object of the preposition. The prepositional phrase can also include any modifiers of the object.
In this sentence, "we need milk, cheese, and eggs" is not a complete prepositional phrase because it does not include a preposition. "For the Sunday brunch" is the complete prepositional phrase because it includes the preposition "for" and the object of the preposition "the Sunday brunch." Therefore, the correct answer is C.