Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) A decrease in demand causes a decrease in the equilibrium price; the decrease in price causes supply to decrease.
B) A decrease in demand causes the equilibrium price to fall; the decrease in price then results in a decrease in quantity supplied.
C) If both demand and supply increase,there must be an increase in the equilibrium price; equilibrium quantity may either increase or decrease.
D) If demand decreases and supply increases one cannot determine if the equilibrium price will increase or decrease without knowing which change is greater.