Final answer:
The organizations fooled by Ferdinand Waldo Demara apparently chose to accept the risk of fraud by not diligently checking references.
Step-by-step explanation:
In this question, the organizations that were fooled by Ferdinand Waldo Demara apparently chose to accept the risk of fraud. By not diligently checking references, they were willing to believe Demara's claims without verifying them. Demara's ability to convincingly portray different roles allowed him to successfully deceive these organizations and hold positions for which he did not have the necessary qualifications.