question: income distribution:gini coefficient
choices.label: A B C D
choices.text: food expenditure:engel coefficient cpi:consumer price index environmental protection:happiness index hong kong:hang seng index
explanation: the indicator to measure the fairness of "income distribution" is the "gini coefficient". the indicator for judging the proportion of the total personal consumption expenditure of "food expenditure" is the "engel coefficient". the abbreviation for "consumer price index" is "cpi". there is no obvious logical relationship between "environmental protection" and the "happiness index". the important indicator for judging the stock market price of "hong kong" is the "hang seng index" rather than "hong kong".
relation: income distribution gini coefficient R3.3
relation: food expenditure engel coefficient R3.3
relation: cpi consumer price index R2.1