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:
The word las tollas means "the towels"
El carro que tenia mi mama era un lincoln. El carro era largo, rapido y plateado
diría que es 'un proyecto de apoyo a las comunidades indígenas mediante la venta de café'
