Give the Purpose of TPP as a Coenzyme

Multiple Choice

Give the purpose of TPP as a coenzyme.

A) a coenzyme that catalyzes the transfer of a one-carbon fragment
B) a coenzyme that catalyzes the carboxylation of the alpha carbon
C) a coenzyme that catalyzes the transfer of a three-carbon fragment
D) a coenzyme that catalyzes the carboxylation of the beta carbon
E) a coenzyme that catalyzes the transfer of a two-carbon fragment