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.

When a database eliminates companies that cease to exist because of a merger or bankruptcy, this can result in:
Option A:look-ahead bias.
Option B:back-testing bias.
Option C:survivorship bias.

Answer: C