单选题 Capital market efficiency is desirable, but there are limitations in achieving full market efficiency. Which of the following is least likely to be a limitation in achieving full capital market efficiency?

A. Cost of trading.
B. Survivorship bias.
C. Limits of arbitrage.

【正确答案】 B

【答案解析】Survivorship bias is not a limitation in achieving market efficiency. It is a source of unreliability of a market anomaly.