Answer: Traigas
Step-by-step explanation:
In this text we can read the person that talk to Sra. Sánchez (Mrs. Sánchez), does it with a formal language. We can realize this at the beginning of the text by observing that she is called Mrs. Sanchez and not directly by her name and through context, in which all the verbs are conjugated with the second person in singular you and formally. In addition the conjugations are with the Imperative mood.
In this sense, in Spanish grammar the Imperative is used by the speaker to give orders, commands, requests, advice or make requests to one or more people directly. It is also used to exhort, incite or send another person to do something.
The forms of imperative in Spanish exist for all the personal pronouns except the 1st person in singular Yo (I). In addition, note that for its conjugation the imperative is written without the personal pronoun and in present tense.
Therefore, as we can see all the verbs are in imperative and in a formally spoken way (use [use], evite [avoid], ponga [put]) except traigas, because the formal way is traiga [bring].