What was the main subject of investigation in the 1885 Hodgson Report by the Society for Psychical Research (SPR)?

A. The validity of astrology in modern times
B. The paranormal claims of the Theosophical Society, specifically Helena Blavatsky and the Mahatma Letters
C. The existence of ghosts in ancient Egypt
D. The authenticity of the Bhagavad Gita
Answer: 