Which of the following statements regarding rationing and market adjustments are correct? (A) Rationing occurs when a government sets price controls to allocate limited resources efficiently. (B) Price floors lead to a surplus in the market by setting the price above the equilibrium level. (C) A shift in the supply curve always leads to a corresponding change in the price, assuming demand remains constant. (D) In a market with a price ceiling below equilibrium, the quantity demanded exceeds the quantity supplied.