Answer:
B) va a
Step-by-step explanation:
"Pronostico" = (predicton)
"va" is the 3rd person of the present tense of the verb "ir" (to go). However, as possibly happens in all languages, sometimes there are verbs used in conjunction with other words to create different ideas. "ir a" + infinitive (llover) in this case, means that something is going to happen in the near future. El va a cantar (He is going to sing), Tu vas a comer (you are going to eat), etc.