Answer:
B). By calculating how much students may pay for copies based on their magazine's audience size.
Step-by-step explanation:
The examples or illustrations always assist the authors to demonstrate their point more clearly and comprehensively before the audience that would assist them to understand.
As per the question, option B displays the manner in which examples assist the reader better understand the subject matter. 'The calculation of the no. of estimated students who may pay for the copies based on magazine's audience' would provide the reader with the essential information to accomplish their understanding of the topic. Thus, option B is the correct answer.