NO.PZ2023040301000098
问题如下：
Which of the following best describes the majority of the evidence regarding anomalies in stock returns
选项：
A.Weak-form market efficiency holds but semi-strong form efficiency does not
Neither weak-form nor semi-strong form market efficiency holds
Reported anomalies are not violations of market efficiency but are the result of research methodologies
解释：
The majority of evidence is that anomalies are not violations of market efficiency but are due to the research methodologies used. Portfolio management based on anomalies will likely be unprofitable after costs are considered
这题不懂，麻烦解释一下
