Answer these three questions this image shows a war rationing book printed in the united states during world war ii. how does war rationing keep the nation safe? a) it saves food and goods needed by soldiers. b) it makes more people join the armed forces. c) it make agreements with other countries. d) it encourages more people to work in factories. 2) when someone has a choice between two options, the option that he or she does not select is the a) free trade b) demand rate c) opportunity cost d) economic incentive 3) what are incentives? a) the cost of decisions b) the consequences of negative actions c) motivators or reasons for doing something d) the value in dollars of goods or services