单选题 If a 10 percent income increase caused a group of consumers to increase their purchases of television sets from 95 to 105, the group's income elasticity of demand for television sets would be closest to:

A. 1.00.
B. 0.10.
C. 0.83.

【正确答案】 A

【答案解析】Income elasticity is the sensitivity of demand to changes in consumer income. Income elasticity = (percent change in quantity demanded)/( percent change in income) =[(105-95)/100]/0.10=1.00.