What limitation did Thatcher acknowledge in her search for the first nurse anesthetist?

• A. The first nurse anesthetist could have been any nun at any number of Catholic hospitals in the late 1800s
• B. The first nurse anesthetist was Mary Bernard
• C. There were extensive records confirming the first nurse anesthetist
• D. The first nurse anesthetist practiced only in Erie

Answer: (A)

The key idea here is that historical records from the late 1800s are too incomplete to identify a single first nurse anesthetist. Thatcher warned that the earliest practitioner could have been any nun serving in a Catholic hospital of that era because documentation was sparse and not standardized. With records often local, informal, or lost, there’s no definitive name or location to pin down the very first. The other options imply certain facts Thatcher didn’t claim—a specific person, extensive confirmation, or a single city—whereas the acknowledged limitation is precisely the uncertainty caused by those fragmentary records.