What are the 3 most common types of mountain?

1.Fold Mountains (Folded Mountains)
2.Fault-block Mountains (Block Mountains)
3.Dome Mountains

Fold mountains, Fault Block mountains, Dome Mountains.

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