Ashton surveyed some of the employees at his company about their cell phone habits. From the data, he concluded that most employ

It cannot be A, as focusing solely on managers excludes all sales executives. Option C might seem plausible since it is more random, but it doesn't ensure representation of both employee groups. Additionally, each survey would yield the same results since it involves the same individuals. It cannot be D either, for the same reason as A, but now also ignores managers. Hence, the correct choice is B: selecting some managers and some sales executives at random. This approach allows for a sample that includes both categories, selected randomly within those groups. I hope this clarifies things!