Final answer:
The question, 'This founder practiced medicine in Philadelphia for 50 years,' does not have an answer matching the options provided. Dr. James McCune Smith and Dr. David Jones Peck were influential African American physicians of their time, but their medical practices were not based in Philadelphia for the specified duration.
Step-by-step explanation:
The question seeks to identify a founder who practiced medicine in Philadelphia for 50 years. None of the options provided directly correspond to an individual who fits this description based on the historical references given. However, it's worth noting that while Dr. James McCune Smith and Dr. David Jones Peck did practice medicine and were prominent figures in the medical field as African Americans during their time, neither practiced for a span of 50 years in Philadelphia. James McCune Smith practiced in New York and was the first African American to earn a formal medical degree. David Jones Peck was the first African American to receive a medical degree from an American medical school and initially practiced in Philadelphia before relocating.
These historic individuals made significant contributions to medicine and were key influencers during their time, with accomplishments such as James McCune Smith being the first African American published in a medical journal and Peck facing significant professional discrimination despite his qualifications.