Answer:
O ha empezado
Step-by-step explanation:
El carnaval de Ceiba ya ha empezado esta semana. ,, is our full sentence so if we translate this , it translates to: The Ceiba carnival has already started this week.
you can replace the other options into the sentence and it won't sound right, or be right... but you get the point.
good luck and i hope i helped :)