Economic sanctions are the best example of hard power among the given options, as they involve coercive measures to influence a country's behavior. Other options like political treaties and foreign aid are forms of soft power, which focus more on diplomacy and goodwill. Therefore, the correct choice is C. Economic Sanctions.
;
Economic sanctions are a clear example of hard power as they involve coercive measures to influence a country's behavior. Hard power is distinguished from soft power, which relies on attraction rather than coercion. Other options like foreign aid or political treaties represent more diplomatic approaches. ;