You could fill it in with a lot of different words depending on the region, but I would personally go with either quisquilloso or exigente. Both mean picky eaters in this situation.
Bajisimo
i cant add the accent but it s above the first i, like how u have it
just take out the o and add the isimo (with accent)
B. Fueron
Fui is speaking in terms to yourself
Fueron is the best choice because you are talking about what your grandparents did or were they went, in this case you can almost assume the grandparents were doctors there for B. Is the appropriate response.
1. pasamos
2.escribi
3.buseaba
4.pescaba
5.leían
6.haces
Hope this helps