Task: Class Definition Understanding (ontology: Business_Finance/Financial_Industry_Business_Ontology)

Which of the following definitions best describes 'treasury inflation-protected security'?

A. long term term coupon bearing treasury obligation issued in terms of 20 years or 30 years that pays interest every six months until they mature
B. corporate bond program where the coupon rate on outstanding bonds is periodically reset through an auction process
C. bond secured by revenues derived from designated taxes other than ad valorem taxes
D. variable income bond whose principal is indexed to inflation or deflation and thus changes over the life of the security

Answer: variable income bond whose principal is indexed to inflation or deflation and thus changes over the life of the security