The state constitution provides the people the opportunity to directly vote on whether to accept or reject a proposed law. this is known as a a) recall. b) statute. c) local act. d) referendum.

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