The Research by Sam Wineburg and His Colleagues on Students

The research by Sam Wineburg and his colleagues on students' ability to identify fake news on the Internet has shown that _____ are deficient in the ability to identify fake news.

A) middle school students, but not high school or college students,
B) both middle school and high school students
C) middle school, high school, and college students
D) non-student adults more so than students