Which Statement Is FALSE Regarding the Reaction Catalyzed by The \alpha

Which statement is FALSE regarding the reaction catalyzed by the $\alpha$ -ketoglutarate dehydrogenase complex?

A) A long lipollysyl arm transfers intermediates from one active site to another within the complex.
B) This reaction would be expected to be abnormally low in a person suffering from beriberi, a dietary deficiency of thiamine.
C) Two different coenzymes containing sulfhydryl groups participate in the overall reaction.
D) Both this complex and the pyruvate dehydrogenase complex contain a common subunit.
E) The proximity of the catalytic enzymes allows for side-reactions to take place in the cluster.