Final answer:
Telling an engineering friend about your new client's business plan violated the ethical principle of confidentiality.
Step-by-step explanation:
Business Ethics and Confidentiality
Telling an engineering friend about your new client's business plan violated the ethical principle of confidentiality. Confidentiality is an important aspect of business relationships that involves protecting sensitive information from being shared with unauthorized individuals.
In this case, sharing the client's business plan without their consent can be seen as a breach of trust and confidentiality. It is essential to prioritize the privacy and trust of clients when handling their confidential information as a professional.
Always remember to respect the confidentiality of client information and avoid sharing it with others without proper authorization.