Answer:
d. los
Explanation:
las would be if they were women,
lo would be if the subjet is just 1 male person
la would be if the subjet is just 1 female person
1, c
2. d
3. b
4. a
Hay muchas estrellas
Aida and Lorenzo are cousins with Charlie and Sophie
That is what that sentence means :)
I hope this helped.