Scientists use observations and data to form and test

Anything else?  If it's a true/false, the answer should be true

Are there answers? if not i would say the statement is true!! :)))

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