Which of the following will affect market price? A price ceiling above the market-clearing price A price floor above the market-clearing price A price floor below the market-clearing price Both A and C Choose the most correct answer by clicking a button, or by typing a letter from the keyboard and pressing the tab key.   Prices above a price ceiling are: legal, as are prices above a price floor. legal, while prices above a price floor are illegal. illegal, as are prices above a price floor. illegal, while prices above a price floor are legal. Choose the most correct answer by clicking a button, or by typing a letter from the keyboard and pressing the tab key.