What was the effect of volcanoes on the Earths early atmosphere? a) volcanoes released gases to form the atmosphere
b) volcanoes released water vapor
c) volcanoes released gases and water vapor
d) volcanoes changed the landscape

I’m pretty sure it’s D)

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