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Let D= demand, S = supply, P = equilibrium price, Q= equilibrium quantity. What happens in the market for walnuts if the Centers for Disease Control and Prevention announces that consuming a half cup of walnuts each week helps to lower bad levels of cholesterol?a. S increases, D no change, P decreases, Q increases
b. D and S increase, P and Q decrease
c. D no change, S increases, P decreases, Q decreases
d. D increases, S no change, P and Q increase