For this exercise we have to complete the sentences with the correct preterito perfecto of each verb according to the context. The preterito perfecto is the tense used to talk about an action that was completed in a specific time in the past.
Estamos: we are estas: you are estan: they are The question says where are Maria and Adela? You should change “Maria and Adela” to they, do the third option is correct.