Let D = Demand, S = Supply, P = Equilibrium

Multiple Choice

Let D = demand, S = supply, P = equilibrium price, Q = equilibrium quantity. What happens in the market for walnuts if the Centre for Disease Control and Prevention announces that consuming a half cup of walnuts each week helps to lower bad levels of cholesterol?

A) D increases, S no change, P and Q increase.
B) D no change, S increases, P decreases, Q increases.
C) D and S increase, P and Q decrease.
D) D no change, S increases, P decreases, Q decreases.