Which disease might be prevented by not sharing a water base

According to the food plate, which of these foods should make up the smallest part of your diet? a. grains and cereals b. milk and meats c. fruits and vegetables d. fats and oils

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Viruses can cause the following, check all that apply. a. sore throat b. measles c. ear infection d. flu e. chicken pox