succession occurs when you start with barren rock and no soil.

a. Primary

b. Secondary

c. Annual

d. All of these

A)primary because it starts with no soil so that will be the primary if you still don’t get is that it still doesn’t have soil do it will be the first step or primary

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