What type or types of blood flow through the heart?

oxygenated
deoxygenated
both a and b
none of the above

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.

69 is the correct math for the amino acids

i wish i could with all of them i can barley see the first one so here's the answer to the first one b