Which of the Following Is Not a Conflict of Interest

Which of the following is not a conflict of interest?

A) A doctor's referral of a patient to an x-ray lab that he owns for a full work-up without disclosing his ownership interest
B) A purchasing agent's failure to disclose a 22% ownership interest in a supplier that would be chosen anyway
C) A bank officer's solicitation of a charitable contribution for a non-profit organization of which he is a member from a customer with a large line of credit up for renewal in 30 days
D) All of the above are conflicts of interest