Question

complete the sentence with the best relative pronoun. cedarburg held a parade on sunday for soldiers had served in the navy.

Explanation:

To complete the sentence, we need a relative pronoun that refers to "soldiers" (people) and acts as the subject of the relative clause "had served in the navy". The relative pronoun "who" is used for people in such cases (when the pronoun is the subject of the relative clause). "That" can also be used for people in informal or restrictive clauses, but "who" is more appropriate for referring to people.

Answer:

who