Final answer:
To find a representative sample of people in the Midwest region on gun control, Corinne should select a large and diverse group of participants, much like a random sample, which includes various age groups, racial groups, and geographical areas.
Step-by-step explanation:
Corinne is seeking to understand how people in the Midwest feel about gun control. To obtain a sample that best represents this region, it is important to ensure the sample is diverse and inclusive of the population's varied demographics. None of the provided options ideally supports this crucial requirement for a representative sample. However, the methodology closest to achieving representation would be a combination of a large sample size with diverse demographics, including different age groups, racial groups, incomes, and geographical areas, akin to a random sample. Simply focusing on one age group, race, state, or gun owners would not adequately capture the sentiments of the entire Midwest region regarding gun control.