Todd Gable, CFA, was attending a noon luncheon when he overheard two software executives talking about a common vendor, Datagen, about how wonderful they thought the company was, and about a rumor that a major brokerage firm was preparing to issue a p buy recommendation on the stock. Gable returned to the office, checked a couple of online sources, and then placed an order to purchase Datagen in all of his discretionary portfolios. The orders were filled within an hour. Three days later, a brokerage house issued a p buy recommendation and Datagen’s share price went up 20%. Gable then proceeded to gather data on the stock and prepared a report that he dated the day before the stock purchase. Gable has:（）
A. violated the Standards by improper use of inside information.
B. violated the Standards by using the recommendation of another brokerage firm in his report.
C. violated the Standards by not having a reasonable basis for making the purchase of Datagen.