(20 pts)
which principle states that rock layers with the same unique grouping of fossils are of the same geologic age?

a) faunal succesion

b) fossil horizontality

c) fossil superposition

d) fossil correlation

your answer is rna to the question.

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.