The correct answer is D. Stratified sampling.
Stratified sampling is a probability sampling method in which the population is divided into smaller groups, or strata, based on one or more characteristics. A sample is then selected from each stratum in proportion to the size of the stratum in the population. This method ensures that all groups in the population are represented in the sample.
Convenience sampling is a non-probability sampling method in which the sample is selected based on convenience. This means that the researcher selects the individuals or groups that are easiest to reach or that are willing to participate in the study. Convenience sampling is not a reliable method for estimating population characteristics, as it is likely to be biased.
Quota sampling is a non-probability sampling method in which the researcher divides the population into groups based on one or more characteristics and then selects a certain number of individuals from each group. This method is not as biased as convenience sampling, but it is still not a reliable method for estimating population characteristics.
Judgement sampling is a non-probability sampling method in which the researcher selects individuals or groups based on the researcher’s judgment about who would be the most representative of the population. This method is the least reliable of all the sampling methods, as it is highly susceptible to bias.