identify which of these types of sampling is used random str

identify which of these types of sampling is used: random, stratified, or convenience. A market researcher selects 500 people from each of 10 cities.

Stratified sampling refers to a type of sampling method . With stratified sampling, the researcher divides the population into separate groups, called strata.

So, Strataified sampling is the correct answer as researchers divides the data in groups.