In a reading assignment, the main headings and key concepts are useful for finding the general location of information in reading assignments.
Answer: Option B
Explanation:
Reading assignment are essential part of the course in the school and college as they impart the essential information to the students required for their course and in turn also helps them to understand the topic from different viewpoint.
Sometimes when one needs to have a quick reading of the course material then the main headings and the key concepts comes handy as they help us to locate the information that we are looking for in the reading assignment.