This could be answered, theoretically, in many different ways. All of which might sound a bit dirty. The translation of the sentence is: "What ___ ___ (to) do to Juan on vacation?" I could fill in the blanks with "tú quieres" which would translate the sentence to "What do you want to do to Juan on vacation?" Without choices, that is the best I got.
Answer:
Option A (the first option)
Explanation:
Option A says it's the last day of school for Rebecca, that's why she's happy
In the text it says "Por fin llegó el último día del escuela y Rebeca está muy feliz" (Finally the last day of school arrived and Rebeca is very happy) so option A would be correct
Hope it helped
