Which as an example of a participant observation?

A.) Practice writes articles for magazines that appeal to sociologists.
B.) Theodore analyzes data about how people interact.
C.) Hassam watches people as they interact.
D.) Denetra looks at pictures in sociology books.

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling