Ablogger has written a post about the benefits of an artificial sweetener for weight loss. which of the following would be the best evidence to support these claims?

a. conclusions from one scientific study
b. research published in a peer-reviewed journal
c. testimonials from people who have used the sweetener
d. conclusions from a research study funded by the manufacturer of the sweetener

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