My older sister has many responsibilities
The students in Puerto Rico walk to school .
Argentina lies almost entirely within the temperate zone of the southern hemisphere unlike the rest of the continent.
Answer:
c. sus
Explanation:
The correct answer should be sus because that is the possessive adjective for ellos/ellas/ustedes. Mis is the possessive adjective for yo, but the sentence is not talking about themselves. The speaker is talking about other boys, or ellos. Additionally, it is sus and not su because the object (escritorios) is plural.