QUESTION 68 One of the problems with tradable carbon permits is that: O too few were issued in Europe. O too many were issued in Europe. they don't work. O there is no market for them.QUESTION 70 Over a 10-year period, most married-couple families in the second-lowest income quintile: O move to a higher income quintile. O move to a lower income quintile. O stay in the same income quintile O leave the labor force. QUESTION 71 The Census Bureau has formulated some alternative measures of poverty which, in contrast with the old measures: O include before-tax income. O include capital gains. O do not include food stamps. O do not include housing subsidies