Thanks again Justin. That is what I was expecting. But A didn't appear in the entry espaces list in C. I realized (just a few minutes ago) that A didn't consume C. So what I had to do was to create a 'fake' reference from A to C (some action for example). So, now A consumes C and appears in the list, and I can debug now. Not the perfect solution, but it works.
Joao -If you are using an up-to-date version of Studio, that *usually* means that B and A need to be published to get the latest versions of C.
J.Ja