During the Reconstruction era, the federal government made an effort to A
reinstitute pre-Civil War norms in the South
B
lower taxes for both northern and southern states
с
improve the legal and social status of Black people
D

lessen the impact of regulations on businesses

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