29.what triggered the canadian transformation to an industrial nation in the early 1900? a. the gold rush b. falling agricultural and metal prices c. the oil boom d. increased immigration 10.where is the st. lawrence seaway located? a. ottawa b. quebec. c. toronto d. montrel

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