Answer:
Sí, los visitaré cada semana
Explanation:
In the last line, Marta is saying: Very good. It is important to spend time with them.
Based on this, the only answer choice that will fit the dialogue is Pedro saying he will visit them often.
1.What class do you have?
2.How are your classes?
3.Who are your teachers/professors?
4.How are your teachers/professors?