Answer:
It would have to be the first one!
Explanation:
Since you need to have "le gusta" in between, it doesn't make sense with the last two.
yo le gusta mas la leche (doesn't make sense in Spanish grammar)
- Sandra le gusta los refrescos makes much more sense than any of the others!
-(Sanda enjoys/likes the beverages)
You may think the second one is also correct, but it is not. "Le gusta" is only talking about ONE person. If it were to be two people (or more than one) then it would be said "Les Gusta." WIth an "s" at the end. Implying that it is more than one person.
Since Carla and Octavio are the names of TWO people, it cannot be the right answer!