Detailed Answer
Answer (A) is correct. The accountant’s acceptance of two World Cup tickets from a supplier and flying to the stadium in the company’s jet along with a number of the supplier’s executives would threaten the accountant’s adherence to the integrity standard. The integrity standard states that each member has a responsibility to mitigate actual conflicts of interests, regularly communicate with business associates to avoid apparent conflicts of interest, and advise all parties of any potential conflicts. In order to avoid conflicts of interest, employees should refuse any gift, favor, or hospitality that would influence or appear to influence their actions.