Answer:
The correct answer is C.
Explanation:
According to the late astronomer and scientist Carl Sagan, "extraordinary claims require extraordinary evidence". This means that claims that can't be proven by the available evidence (thus considered extraordinary), require to be supported by new or hard-to-acquire evidence. In this case, these claims by some proponents of Scientology aren't supported by the available evidence, as it is currently known that kids don't start forming memories until they're 2 years old. So in order to prove their claims that negative statements can be "reactivated" in adulthood, Scientology proponents would have to come with scientific evidence that fetuses and embryos can remember what it's said to them.