问题
单项选择题
The demand for a product tends to be price inelastic if:（）
A. few good complements for the product are available.
B. few good substitutes for the product are available.
C. people spend a large share of their income on the product.
答案
参考答案：B
解析：
If a large price change results in a small change in quantity demanded, demand is inelastic. Cigarettes are an example of a good with inelastic demand.