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 the price return of an equal-weighted index exceeds that of a market-capitalization-weighted index comprised of the same securities, the most likely explanation is:
Option A:stock splits.
Option B:dividend distributions.
Option C:outperformance of small-market-capitalization stocks.

Answer: C