Final answer:
The Kefauver-Harrison Amendment of 1962 was a response to the Thalidomide Tragedy, where a widely sold medication caused severe birth defects in thousands of infants. c) The Thalidomide Tragedy
Step-by-step explanation:
The event that prompted the Kefauver-Harrison Amendment of 1962 was c) The Thalidomide Tragedy. This tragedy unfolded when Thalidomide, an over-the-counter drug sold as an anti-nausea medication and a morning sickness remedy for pregnant women, was found to be the cause of severe birth defects.
Around 10,000 infants were born with severely deformed limbs, and those who survived were afflicted with other defects due to their exposure to the drug while in the womb. The drug was eventually pulled from the market, and this catastrophic event led to the enactment of the Kefauver-Harrison Amendment, which strengthened drug regulation and ensured better safety testing before a drug could be sold.