Bridgette and ben have created a basketball game in which whoever gets three baskets first wins. there are rules such as how far you have to be from the basket and how much time is allowed before the game is over. according to piaget, this type of play is defined as (a) functional play.(b) symbolic play.(c) constructive play.(d) a formal game.

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