How are price ceilings and price floors similar? O Both involve the government's setting of a maximum price.
O Both represent input changes that affect demand.
O Both bring about disequilibrium in the market.
O Both are examples of government price supports.

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