Charlie, a CFA candidate, got a copy of a computerized stock selection model designed by a former MBA classmate who is a Wall Street analyst. After spending some time reviewing the program and making a few minor adjustments Charlie showed her new model to her supervisor. Her supervisor said she did a great job and told Charlie to incorporate net new model in her next industry review, which she did. Charlie has:（）
A. violated Standard Ⅲ (E) Preservation of Confidentiality.
B. violated Standard Ⅰ (C) Misrepresentation.
C. violated Standard Ⅱ (A) Material Nonpublic Information.