Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

A bond that is characterized by a fixed periodic payment schedule that reduces the bond’s outstanding principal amount to zero by the maturity date is best described as a:
Option A:bullet bond.
Option B:plain vanilla bond.
Option C:fully amortized bond.

Answer: C