Final answer:
The best choice for ethical conduct when companies operate abroad in the absence of home-country legal constraints is to adapt in varying degrees to local customs and practices.
Step-by-step explanation:
The best choice for ethical conduct when companies operate abroad in the absence of home-country legal constraints is to E) adapt in varying degrees to local customs and practices.
Operating ethically in foreign countries involves understanding and respecting the cultural, social, and legal norms of those countries. Companies should strive to align their operations with local customs and practices, while still upholding a standard of ethical conduct. This may involve adapting certain business practices, such as gift-giving or negotiation methods, to be in line with local expectations.