Answer:
The correct answer is letter "C": How the bill is shared has no effect on what and how much people choose to eat.
Explanation:
Regardless of the price, the friend who likes steak, the other who drinks wine, and the vegetarian are unlikely to change their eating preferences. Just because the bill is to be shared it does not imply that the vegetarian will eat stake or that the friend who eats steak will prefer to choose wine.