¿prefieres esta flauta o en la mesa?

a.
ése
b.
éste
c.
ésa
d.
éstos

The answer is: C. ¿Prefieres esta flauta o ésa en la mesa.?

Since the noun is a feminine singular object and it's far, the proper option is ésa/that.

- Do you prefer this flute or that flute on the table?

- ¿Pefieres esta flauta o ésa flauta en la mesa?

The other given options don't fit since:

A. ése/that: Even it's a singular and far demonstrative pronoun, it's referring to a masculine noun.

B. éste/this: It's a singular demonstrative pronoun too, but it's referring to a near masculine noun.

D. éstos/these: It's a plural demonstrative too, but it's referring to plural and near masculine noun.

Have a nice day!

the answer is c. estudió

explanation:

to translate: last year a group from my school went to cuba and studied the history of the island. you would use preterite form because it was one time and they use fue in the sentence.