Which of the following methods of sampling is an example of a stratified random sample? A. Randomly choosing a name from a list of names in the population and then choosing every tenth name thereafter. B. From 500 names of members of a population in a hat drawing 50 names from the hat without looking. C. Dividing a target population of students by grade level and choosing the first 25 names from each group. D. Dividing a population of adults into males and females and randomly choosing a sample proportional to the numbers in each group.