I then registered at Worcester Polytechnic Institute. It was 1969. I spent every weekend at home to keep my successful business going. . . . I found that at college I could get help from my teachers with solving business problems and in learning new techniques for designing new things. I enjoyed talking to my professors and learning physics and other complex subjects – but I never had time to go to class. I literally never went to class. —“"On Becoming an Inventor,"
J. Dean Kamen

Which detail from the text supports the opinion that Kamen thought running his business was more important than doing well in school?

He spent every weekend at home.
He got help with solving business problems from his teachers.
He learned new techniques for designing new things from his teachers.
He never had time to go to class.