Which of the following best reflects the authority of Dr. Janice Gershwin in her field?

The choice highlighting Dr. Janice Gershwin's long-term research experience accurately reflects her authority in her field because experience typically indicates a deep understanding and mastery of the subject matter. This extensive background can suggest that she has contributed valuable knowledge and gained practical insights over time, which enhances her credibility as an expert. Long-term research experience also often entails not just theoretical knowledge, but the ability to apply that knowledge in real-world scenarios, mentor others, and lead projects, all of which are critical components of authoritative status in any professional field.

While her affiliation with Harvard Medical School, published works, and public speaking engagements all contribute to her reputation and authority, long-term research experience is foundational as it signifies sustained engagement with the field, allowing her to accumulate and develop expertise that can be invaluable to her peers and the community.