The statement that "the law is not a complete guide to ethics" means that:

Why D is correct

The law sets the minimum standard of conduct, but ethical conduct often requires more than the law demands. A producer can act within the letter of the law yet still harm a client, so ethical duties such as honesty, competence, and client-first service go beyond legal minimums. This principle reminds producers to consider the spirit of the rules and the client's welfare, not merely to avoid legal violations. Regulators and courts alike expect producers to hold themselves to this higher standard of conduct.

Why the other options are wrong

• A) The statement says the opposite: ethics extends beyond the law, so obligations do not end at the legal line. The maxim means the opposite: ethics demands more than the law, so obligations continue past the legal minimum.
• B) Ethical behavior cannot justify breaking the law. The law is a floor that must always be met. Ethics never excuses violating the law; the law remains a floor that conduct must always satisfy.
• C) Ethics applies to all conduct and all clients at all times, not only when a complaint arises. Ethical duties run continuously and apply to every client, not merely when a complaint surfaces.

Memory hook

Law = the floor; ethics = the ceiling of good conduct. Never live on the floor when you can aim higher.