Choose the correct form of ser to complete the sentence below. nosotros mexicanos. a. soy d. somos b. eres e. son c. es

The spanish verb ser (to be) is conjugated with each subject pronoun, as follows:  

1st person singular: Yo soy

2nd person singular: Tú eres

3rd person singular: Él/Ella/eso/esa es  

1st person plural: Nosotros somos  

2nd person plural: Ustedes (In latinAmerica) son

2nd person plural: Vosotros (In Spain) sois  

3rd person plural: Ellos/Ellas son

Now, this sentence is written in present tense with the first person in plural nosotros (we), therefore the right conjugation according the list aboveis somos.

Then the complete sentence is:

Nosotros somos mexicanos

We are mexican

The options soy (I am), eres (you are), son (they are) and es (he/she/it/is) are not correct because do not match with the subject in the sentence in number or in genre.