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.

A float-adjusted market-capitalization-weighted index weights each of its constituent securities by its price and:
Option A:its trading volume.
Option B:the number of its shares outstanding.
Option C:the number of its shares available to the investing public.

Answer: C