问题如下：
Aaron works for company A. The company used complex quantitative analysis and evaluated that the stock price of company B would increase from $15 per share to $20 per share. He stated to clients that, “Based on the fact, the stock price of company B will increase to $20 per share, I recommend a strong buy”. From this information, we can know that:
选项：
A. He did not violate the standard.
B. He violated the Standards because he failed to distinguish between opinions and facts in his recommendation.
C. He violated the Standards because he did not use reasonable judgment.
解释：
B is correct.
According to Standard V(B) Communication with Clients and Prospective Clients, it requires that members and candidates must distinguish between facts and opinions. Aaron used the conclusion of the quantitative analysis as facts and told the clients which violated this Standard.
因为用了fact这个词，所以就违反了
