Answer:
c. Charles offers Sam between exist15 and exist40 not to smoke. Sam accepts, and both parties are better off.
Step-by-step explanation:
Since in the question it is mentioned that Charles wants to dine in a restaurant i.e. fancy but the table that only available in the smoking section and he not like the smell of cigarette also he notice that one person that named Sam smoking there so based on the given situation the option c would be chosen as Sam received the gain of $15 by smoking but also he received more than $15 in cash when he accept and stop smoking
Therefore the option c is correct