Use the Following Epidemiologic Study to Answer the Following Exercises

Use the following epidemiologic study to answer the following exercises.
In an epidemiologic study of periodontal disease, the dental hygienist identified a population of 100 individuals but could only select 50 for examination because of time and resource constraints.All of the individuals were to be examined within 2 weeks while they were visiting the local dental clinic.The dental hygienist planned to probe all teeth in each subject and set the definition of disease at one probe depth of 4 mm.The dental hygienist was also interested in identifying risk factors; therefore the subjects were questioned regarding age, socioeconomic status, and smoking status.Both men and women were included in the study and were in equal proportion in the population of 100.
-What kind of epidemiologic study is planned?

A) Cohort design
B) Case-control design
C) Cross-sectional design