Final answer:
The correct personal pronoun to fill in the blank is 'les'. It is used as an indirect object pronoun.
Step-by-step explanation:
The correct personal pronoun to fill in the blank in the sentence 'A los estudiantes les importan sus estudios' is option A. Les.
The pronoun 'les' is the appropriate personal pronoun to use when referring to a group of people as indirect objects. In this sentence, 'les' is used to indicate that the studies are important to the students. Here, 'los estudiantes' is the indirect object, and 'les' is the appropriate pronoun to replace it.
For example:
- A los estudiantes les gusta estudiar.
- Les duele la cabeza a los estudiantes.
Learn more about Personal pronouns in Spanish