(Choose 1 answer)
According to Principles and Standards of Ethical Supply Management Conduct by ISM, which of the following statements is not a recommended guideline for maintaining positive supplier's and customer's relationships?
A. Develop and implement policies and procedures for business processes that are fair, unbiased and applied consistently.
B. Encourage prompt and fair problem resolution.
C. Avoid unreasonable demands.
D. Communicate secretly and indirectly.
