The greatest difficulty facing contemporary parapsychology is the

A) inability to subject claims of ESP to scientific testing.
B) lack of a reproducible ESP phenomenon.
C) willingness of many experts to accept fraudulent evidence.
D) difficulty of persuading many ordinary people that there really is such a thing as ESP.

Parapsychology

The study of mental phenomena that are excluded from or inexplicable by orthodox scientific psychology, such as telepathy and psychokinesis.

ESP Phenomenon

Extra-sensory perception; claimed perception of information not gained through the known human senses and not deducible from previous experience.

Scientific Testing

A methodological process of experimenting and observation to acquire new knowledge, validate theories, or test hypotheses under controlled conditions.