What process is most directly involved in oil formation? A: formation of fossils of sea organisms over many years
B: changes in the ocean environment
C: breakdown of marine organisms’ remains under layers of sediment
D: erosion of sediments on the sea floor

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The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey