Regarding Parapsychology Studies, Which of the Following Statements Is/are TRUE

Multiple Choice

Regarding parapsychology studies, which of the following statements is/are TRUE?

A) The same researchers using the same experimental subjects typically cannot get similar results every time in a parapsychology study.
B) ESP researchers believe the "decline effect" seen in most parapsychology studies indicates that parapsychological skills are very fragile.
C) Critics argue that a person who only temporarily scores above chance in a parapsychology study has just received credit for a run of luck.
D) All of these statements are true.