Which of the following is a risk of skipping health screenings?
a) late diagnosis
b) early diagnosis
c) illnesses unidentified
d) receiving treatment

There are numerous risks involved when a person skips their health screenings. One risk if to have an unidentified illness and also get a late diagnosis. If you keep your health screenings, you can get an early diagnosis and receive treatment. Both A and C fit the answer. However, C seems to be the better answer. 

This is true. yes. indeed.