Malaking pinsala sa mga ari-arian ang idinulot ng mga bagyo at pagbaha. Alin sa mga sumusunod ang kasanayang kailangan sa pag-aaral ng kontemporaryog isyu tungkol sa mga natural na kalamidad? * 1 point

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