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

Which of the following definitions best describes 'future on future'?

A. futures contract whose underlying asset is an agreement to exchange a specified amount of one currency for another at some point in the future based on pricing stated in the contract
B. futures contract whose underlying asset is at least one swap contract
C. futures contract whose underlying asset is at least one option contract
D. futures contract whose underlying asset is at least one (other) futures contract

Answer: futures contract whose underlying asset is at least one (other) futures contract