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.
Answer:
1. Julián es más organizado que su vecino.
2. Matilde es tan inteligente como su hermana.
3. Elena corre tanto como José.
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 logically conjugate the verbs, and that these have concordance with what is being expressed.
B. Es
Ella es inteligente; she is smart
