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.

If a commodity’s forward curve is in contango, the component of a commodities futures return most likely to reflect this is:
Option A:spot prices.
Option B:the roll yield.
Option C:the collateral yield.

Answer: B