The correct answer is D. Simple random sampling.
Simple random sampling is a probability method that seems to be objective, accurate and unbiased. It is the most basic and widely used sampling method. In simple random sampling, each member of the population has an equal chance of being selected. This can be done by using a random number generator or by drawing names out of a hat.
Quota sampling is a non-probability sampling method in which the researcher sets quotas for different groups in the population and then tries to find people from those groups to interview. This method is not as accurate as simple random sampling because it does not take into account the chance that some people are more likely to be selected than others.
Judgment sampling is a non-probability sampling method in which the researcher selects people based on their judgment of who would be the most representative of the population. This method is also not as accurate as simple random sampling because it is based on the researcher’s judgment, which may not be accurate.
Convenience sampling is a non-probability sampling method in which the researcher selects people who are convenient to reach. This method is the least accurate of all the sampling methods because it does not take into account the chance that some people are more likely to be selected than others.
In conclusion, simple random sampling is the most accurate and unbiased sampling method. It is the best choice when the researcher wants to make sure that the sample is representative of the population.