The organization of petroleum exporting countries (opec) had two viable reasons for enforcing an embargo on the oil it shipped to the united states during the 1970s. the embargo was designed to a. raise the price of oil and improve opec-u. s. relations. b. decrease the price of oil and enforce middle-eastern resentment concerning u. s. support of israel. c. raise the price of oil and enforce middle-eastern resentment concerning u. s. support of israel. d. decrease the price of oil and force the u. s. to find new methods of oil production.