Which of the following best encompasses personality? a. behavioral patterns that are common in most people b. the ability to keep promises and always tell the truth c. the way in which one exhibits integrity on a daily basis d. the set of mental, emotional, and behavioral patterns unique to an individual

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