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In game theory, if one strategy always yields the highest benefit for the player using it no matter what choice a rival makes is the Select one: O a. dominant strategy. O b. prisoners' strategy c. matrix strategy. O d. cooperative strategy. Canada's Old Age Security Plan Select one: O a. guarantees that an elderly person will never fall below the poverty level O b. Benefits are "pay-as-you-go. O c. is a retirement program investing the person's contributions into interest-earning financial assets O d. is an insurance program operated by the local government