Rift valleys can form when fractures in the Earth's crust widen. The valley walls slowly move at a rate of only a few millimeters a year. Which of these best describes the types of tectonic activity that forms rift valleys? a.)
b.)
c.)
d.)

My best answer would be C I hoped I helped sry if you get it wrong

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