Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

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