Choose the correct form of the verb estar that would be used in this sentence
i am at home
a estar
b estoy
c estais
d estamos

Estoy is the conjugation of the verb estar for the first person singular in the simple present. Here the verb estar is being used as location, describing where I'm temporarily. On the other hand, the simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. So I am at home an this is as follows:

Estoy en la cocina

answer: the answer is b. se quejan because it's in the plural form.