Peggy Green, CFA, is a research analyst following Brown Co. All the information she has gathered suggests the stock should be rated a weak "hold" . During a recent lunch, Green overheard another analyst say that the stock should be rated a "buy". Green returns to her office and issues a "buy" recommendation. Green:（）

A. violated CFA Institute Standards of Professional Conduct because she did not seek approval of the change from her firm’s compliance director.

B. has violated CFA Institute Standards of Professional of Conduct because she did not have a reasonable and adequate basis for making this recommendation.

C. is in full compliance with CFA Institute Standards of Professional Conduct.