In which type of sampling are different probabilities used to sample different population categories? a. Proportional stratified sampling b. Disproportional stratified sampling c. Cluster sampling d. Snowball samplingUnlike stratified random sampling, quota sampling does not: a. divide the population into relevant strata. b. offer a cheap, easy, and convenient method of sampling. c. select for sample-appropriate ratios of population elements that fit specific characteristics. d. provide all population elements a known probability for being selected