Answer:C. Fixed pension benefits have been eliminated in the U.S. by around 90 percent.
Explanation: Social contract is a term used in sociology to describe the contractual obligations between different facets or categories of persons in a social setting which enables them to effectively establish a moral,political and economical etc ways of executing or doing things.
When people are in a Social contract with their Government,it means both the Government and the people have certain rights and responsibilities which they have to perform to sustain their relationships.