Answer:
whomever
Step-by-step explanation:
In this example, the correct word to employ would be "whomever." Whomever is an object pronoun. Because of this, it serves as the direct object of a verb or the object of a preposition. On the other hand, "whoever" is a subject pronoun. This means that it is normally used as the subject of the sentence, or the person or thing that is performing the action of the verb.