Final answer:
One ethical duty of all cosmetologists is to help clients set realistic expectations about the results of services.
Step-by-step explanation:
One ethical duty of all cosmetologists is to help clients set realistic expectations about the results of services. Cosmetologists should provide accurate information to clients about what can be achieved through various treatments and services, and help them understand any limitations or potential risks involved. For example, if a client wants a drastic hair color change that may damage their hair, the cosmetologist should explain the potential consequences and recommend a safer alternative.
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