Asurvey of professional economists revealed that more than three-fourths of them agreed with fourteen economic propositions. which of the following is not one of those propositions? a. the united states should implement universal health care for its citizens. b. a ceiling on rents reduces the quantity and quality of housing available. c. the gap between social security funds and expenditures will become unsustainably large within the next fifty years if current policies remain unchanged. d. fiscal policy has a significant stimulative impact on a less than fully employed economy.