The supply curve slopes up and to the right.If the demand curve shifts upward to a new curve which is everywhere higher than the old curve（but possibly of different slope） and if the supply curve does not shift， then the equilibrium price and quantity mus

The supply curve slopes up and to the right.If the demand curve shifts upward to a new curve which is everywhere higher than the old curve（but possibly of different slope） and if the supply curve does not shift， then the equilibrium price and quantity must necessarily increase.。
A.正确
B.错误
正确答案：正确