How has corn changed the bacteria found in the digestive system of cows? why is this a problem? 20 points

Cows have a diet of mostly grass and when people feed the cows corn it changed their diet and the bacteria found it the system.
(I did not copy this)

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

The correct answer is d