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.

Which of the following factors most likely explains why the spot price of a commodity in short supply can be greater than its forward price?
Option A:Opportunity cost
Option B:Lack of dividends
Option C:Convenience yield

Answer: C