Which rule emphasizes the need for supervision of tasks delegated to assistants?

The correct choice highlights the importance of professional supervision in the practice of speech-language pathology, especially concerning the tasks delegated to assistants. Principle of Ethics II, Rule of Ethics E specifically states that individuals must provide appropriate supervision to those who assist them, ensuring that the delegated tasks adhere to the standards of practice and benefit the clients effectively.

Supervision is critical in maintaining the quality of care and ensuring that assistants are adequately trained to perform their duties. This principle reinforces the responsibility of qualified professionals to oversee the work of their assistants to safeguard ethical practice, client safety, and effective intervention strategies. It's essential that assistants work under the guidance of a licensed speech-language pathologist to ensure that all activities align with established clinical protocols and ethical standards.

In contrast, other rules cited do not focus as directly on supervision in relation to assistant tasks. They touch on different aspects of ethical practice, such as client welfare and professional competence, but do not emphasize the supervisory aspect as explicitly as the selected choice does.