Final answer:
An effective response to the possibility of a conflict of interest in a supplier selection process would involve discussing the situation with the colleague, reviewing the selection guidelines, and consulting with management to preserve the integrity of the process.
Step-by-step explanation:
The scenario you've presented involves a potential conflict of interest and ethical dilemma within a supplier selection process. When facing such a situation, it's important to address it carefully and professionally. According to the given context, one could argue that the most effective response involves a blend of direct communication with the colleague to understand their perspective, review of the selection guidelines, and consultation with management to ensure that the integrity of the process is maintained. This approach acknowledges the potential influence of personal connections in professional decisions, the importance of adhering to a rigorous selection process, and the need to prevent any semblance of impropriety that could arise from guanxi relationships or appearances of favoritism.