
Passage: In the past five years, food prices in W city have risen by an average of 25%. At the same time, residents' spending on food as a percentage of the city's monthly household income has risen by only about 8%. As a result, the average household income in W City has risen in the past two years.
Question: Which of the followings is most likely to be the hypothesis of the above argument?
A. A.In the past five years, the family living standard in W city has generally improved
B. B.In the past five years, the average price of goods other than food in W city has risen by 25%
C. C.In the past five years, the amount of food purchased by W city residents has increased by 8%
D. D.The amount of food purchased by each household in W City has not changed in the past five years
Answer: