In Cuba the day is celebrated with parades but is not a public holiday. Cubans celebrate on October 10 as their “Dia de la Independencia” to commemorate when in 1868 the fight for independence started with the Ten Years’ War.
The correct answer is:
A. David ha abierto la lata.
"David ha abierto la lata", is the best Spanish equivalent to, "David has opened the can".

Hoy es Lunes
2 correcto
3...im not very sure, but , cómo will be my answer
4cuantos estudiantes hay en la sala?
This monument is incredible!
Answer:
which audio? I can't help you without listening to it