Hal Attended Catholic School Up Through His Graduation from High

Hal attended Catholic school up through his graduation from high school. In the fall, he will be heading off to college at a state university. It will be the first time he's lived on his own, and the first time he's attended a public school. What is likely to be the biggest difference between Hal's experience in high school and his experience in college?

A) His classmates will have a more diverse set of beliefs and cultural practices.
B) He will be expected to participate in classes and complete assignments on time.
C) Some of his classmates will be interested in athletics, while others will not.
D) He will be expected to arrive to class on time and stay until class ends.