Which pronoun correctly completes the sentence: "Although the chances of being victimized are slim, airport thieves, __________ look like ordinary travelers, can take your purse?"

In the given sentence, the correct pronoun is "who," which serves as a subject pronoun that introduces a relative clause. The clause "who look like ordinary travelers" provides additional information about "airport thieves." Using "who" in this context emphasizes that these thieves are also individuals who appear to blend in with typical travelers, which adds depth to the meaning of the sentence.

"Who" is used when the pronoun refers to the subject of the verb in the relative clause. In this case, "look" is the verb, and "airport thieves" is the subject performing the action of looking like ordinary travelers. This structure allows the reader to clearly connect the characteristics of the thieves to the main idea of the sentence about the risk of victimization.

The other options do not fit this grammatical structure. "That" is more commonly used for referring to objects or things rather than people in this context. "Whom" is an objective case pronoun and would be used to refer to the object of a verb or a preposition, which doesn't apply here. "Whose" is a possessive pronoun, which would indicate ownership or association, but does not complement the verb "look" in this context. Therefore, "who"