Ella una alumna en el colegio martí.
a.
soy
d.
somos
b.
eres
e.
son
c.
es

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

tú eres  

él/ella es  

nosotros somos

ellos son

ESTAR:

yo estoy

tú estás

él/ella está  

nosotros estamos

ellos están