Corruption in the context of unethical practices typically involves wrongdoing for personal gain or to benefit another at the expense of the organization. Demanding payment from a vendor for decisions made in the vendor's favor is a clear example of corruption, as it involves misuse of authority for personal benefit. The other options listed deal with accounting manipulations or reimbursement fraud, which, while unethical, are not examples of corruption as defined in auditing terminology.References: Association of Certified Fraud Examiners (ACFE) - Fraud Definitions and Classifications