The correct answer is option C.Es.
Explanation:
The tense used in this case is Present Simple. We use this tense to describe a habit, routine or something that happens now.
In the case of the verb SER, unlike English where we use the verb "to be" as SER or ESTAR these have different meanings.
The verb SER describes appearances, identity, family relationships, when and where an event takes place, time and date.
The verb ESTAR expresses a mood or health status, an aspect, the marital status of a person, their location.
The ways to conjugate each verb for different people of the present is as follows:
SER:
yo soy
tĂş eres Â
Ă©l/ella es Â
nosotros somos
ellos son
ESTAR:
yo estoy
tú estás
Ă©l/ella está Â
nosotros estamos
ellos están