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.

One month after inception, the price return version and total return version of a single index (consisting of identical securities and weights) will be equal if:
Option A:market prices have not changed.
Option B:capital gains are offset by capital losses.
Option C:the securities do not pay dividends or interest.

Answer: C