The answer would be A.
Casa is house/home and it makes the most sense in this sentence :)
Have a good day!
If you can translate that then I can help you.
There is a frog. The frog has a small mouth. The frog has a problem. The poor frog can't eat with a small mouth. So the frog's friend has a solution. The frog's friend makes tiny sandwiches for the frog.
