Which Statement Is True About Prion Diseases

Which statement is true about prion diseases?

A) Prions are believed to cause Creutzfeldt-Jakob disease (CJD) .
B) Prions are misshapen proteins that cause other proteins to change shape.
C) Mad cow disease (BSE) is spread by consumption of cattle feed contaminated with prions.
D) The buildup of these abnormal proteins cause a loss of neurons.
E) All of the answer choices are true statements about prions.