According to the independence rules, an auditor would impair his or her independence in the following circumstances? A. Where the auditor's spouse is employed by the audit client as director of internal audit. B. Having a checking account at a client's financial institution where the balance is insured under the FDIC rules. C. Owning an investment property with a 25% shareholder of an audit client where the investment is material to the auditor's net worth. D. Serving on the board of a non-profit client where the position is honorary; he or she does not advise or participate on voting or management functions, and the position is identified on written materials as honorary. E. A & C