What is the proposed mechanism by which humans acquired the new variant form of Creutzfeldt-Jakob disease?

A) Humans who received blood from CJD infected donors.
B) Humans who received corneas from CJD infected donors.
C) Humans who participated in ritualistic cannibalism.
D) Humans who ate sheep infected with the scrapie agent.
E) Humans who ate cows infected with the BSE agent.