Answer:
b.U.S. leaders worked to improve relations with foreign countries to protect its access to natural resources.
Explanation:
a.U.S. leaders worked to bring peace to countries at war with each other to improve its image in the world.
This option appears wrong because image building can not become the objective of a country.
Option C and D too are wrong because OPEC is formed by the oil countries themselves . So option C is wrong.
Once Opec sanctioned embargo against US to stop oil supply when US supplied arms to Isreal . So option D is wrong.