Most of Tyler's Classes This Term Are Humanities Courses, but He

Most of Tyler's classes this term are humanities courses, but he is also taking chemistry. What must Tyler do while reading his chemistry textbook that he doesn't have to do while reading the textbooks in his humanities courses?

A) scan the assigned chapter before he begins reading it
B) take notes on the reading, using symbols to indicate connections between ideas
C) think about his reactions to the material that he reads
D) practice the concepts through problem sets and exercises