单选题 Assume a good becomes illegal to buy or sell, and the expected penalty for selling the good is greater than that for buying the good. Relative to when the good was legal:

A、 price and quantity will rise.
B、 price and quantity will decline.
C、 price will rise and quantity will decline.

【正确答案】 C

【答案解析】[解析] 如图所示，如果对生产非法商品的罚金高于对购买此类商品的罚金，即商品供给曲线的左移幅度高于需求曲线的左移幅度，则非法商品的均衡价格P ₁ 将高于同类合法商品的均衡价格P ₀ ，而非法商品的均衡产量Q ₁ 将低于同类合法商品的均衡价格Q ₀ 。