Which statement is most consistent with the negative state relief model?

Which statement is most consistent with the negative state relief model?
 
  a. Shoppers who are given a free gift are more likely to donate money to a solicitor as they leave the store.
  b. Students who feel guilty about falling asleep in class are more likely to volunteer to help a professor bycompleting a questionnaire.
 c. Professional athletes are more likely to sign autographs for fans following a win than following a loss.
  d. People who win the lottery are more likely to give money to charity than those who have not won the lottery.