Final answer:
The answer that is not true of core ethical principles for government and contractor acquisition professionals is 'd) Exclusive focus on personal interests', as ethical principles emphasize impartiality, accountability, and legal compliance, not self-interest.
Step-by-step explanation:
The option that is not true of core ethical principles for government and contractor acquisition professionals is d) Exclusive focus on personal interests. Ethical principles in acquisition and procurement stress unbiased decision-making, personal accountability, and adherence to the law—not self-interest.
Examples of core ethical principles for acquisition professionals include a) Unbiased and impartial decision-making, which means making decisions based on merit rather than favoritism; b) Accountability for personal actions, which entails taking responsibility for decisions and their consequences; and c) Compliance with laws and regulations, which ensures legal integrity in the acquisition process.