Which of the following demonstrates a scenario with no opportunity cost?
-It's Friday night and you have no obligations the next day, so you stay up late talking and hanging out with your friends.
-The chemistry club is giving out free pizza for lunch to all who come to their table to get it.
-Naomi, age 8, is at a bookstore and chooses to buy a book about a young wizard instead of buying a math textbook that she would probably never open.
-Chez Moi and Chez Nous, two premiere French restaurants with three Michelin stars, both offer you a full time sous chef job at the same salary. You are ecstatic because you know it is a win-win scenario and choose to work for Chez Nous.
-All of these scenarios have an opportunity cost.