Answer:
Correct option is B.
The net benefit of the activity you would have chosen if you had not taken the course
Step-by-step explanation:
Your opportunity cost of taking this course is the net benefit of the activity you would have chosen if you had not taken the course
Opportunity cost is what you must sacrifice when you choose an activity. By taking this course, you are sacrificing the benefit you could have obtained from the activity you would have chosen if you had not taken the course.