Sheryl, a well-known and highly-regarded financial planner had a large and growing financial planning business. One thing Sheryl refuses to do is run away new business. At times, this caused Sheryl to be rather slow in responding to clients questions, if she responded at all. To date, however, no client has complained about Sheryl's tardiness and the quality of Sheryl's work exceeds her client's expectations. What ethical standard, if any, has Sheryl violated? Explain.