Final answer:
Every EMT can participate in quality improvement through continuing education, which helps them stay current with medical advancements and improves patient care.
Step-by-step explanation:
One aspect of quality improvement in which every EMT can participate is D. Continuing education. Continual learning and updating skills are crucial in the medical field. By engaging in continuing education, EMTs can stay current with the latest medical protocols, technology, and treatment strategies. This ongoing process not only enhances their expertise but also directly impacts the quality of care provided to patients. Furthermore, it supports EMTs in making decisions with a higher level of confidence and competence. In contrast, standing orders, patient counseling, and protocols are more specific operational activities rather than ongoing participatory professional development activities.