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.

Rebalancing an index is the process of periodically adjusting the constituent:
Option A:securities’ weights to optimize investment performance.
Option B:securities to maintain consistency with the target market.
Option C:securities’ weights to maintain consistency with the index’s weighting method.

Answer: C