Answer:
B. is always the value of the next best forgone opportunity.
Explanation:
Opportunity cost is the value of the next best alternative to any decision you make; for example, you spend time and money going to a movie, you cannot spend that time at home reading a book, and you cannot spend the money on something else. If your next-best alternative to seeing the movie is reading the book, then the opportunity cost of seeing the movie is the money spent plus the pleasure you forgo by not reading the book.
