Answer:
Marta y yo compramos unos geles. Nuestros geles son verdes.
Explanation:
• Identifying the narrator and the time that a sentence indicates is the first step that must be taken. this is very important to be able to conjugate the adjectives, and that these have concordance with what is being expressed
I believe that it would be B (reloj) since it is talking about how there is a window, a door and then a clock in a classroom.
It is also giving you the masculine singular form indicating that it can only be reloj.