Assuming this is in the present tense, the correct answer would be B, "bebe". You can deduce this because Ella is the person doing the action. So the verb must be in the el/ella/usted form. Since the verb beber ends with "-er" conjugating this verb into el/ella/usted form requires to take off the "-er" ending and add "e". Hence, "bebe".
Question 1: Uds. (empezar)
Answer 1: Ustedes empiezan.
Question 2: Ud. (mirar)
Answer 2: Usted mira.
Question 3: Ud. (escribir)
Answer 3: Usted escribe.
Question 4: Ud. (comer)
Answer 4: Usted come.
Question 5: Ud. (beber)
Answer 5: Usted bebe.
Question 6: Ud. (respirar)
Answer 6: Usted respira.
Question 7: Usted (estudiar)
Answer 7: Usted estudia.
Question 8: Usted (escuchar)
Answer 8: Usted escucha.
Question 9: Ustedes (beber)
Answer 9: Ustedes beben.
Question 10: Usted (ver)
Answer 10: Usted ve.
Question 11: Uds. (usar)
Answer 11: Ustedes usan.
Question 11: Uds. (estudiar)
Answer 12: Ustedes estudian.
Question 13: Uds. (escribir)
Answer 13: Ustedes escriben.
Question 14: Uds. (comer)
Answer 14: Ustedes comen.
Question 15: Uds. (bailar)
Answer 15: Ustedes bailan.
<span>a ellos no _les____ importa el itinerario</span>
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