9. Assume the rent ceiling is effective and both the law of demand and the law ofsupply hold true. When the government raises the rent ceiling,(A) The market transaction volume will increase(B) The market transaction volume will decrease(C) Deadweight loss will increase(D) Both ( B ) and ( C ) are correct

14.Which of the following statements about the shape of an indifference curve iscorrect?(A) The higher the substitutability between two goods, the smaller the curvatureof the indifference curve.(B) The higher the substitutability between two goods, the greater the curvatureof the indifference curve.(C) The indifference curve of perfect complements is a straight line.(D) Both ( A ) and ( C ) are correct.

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