According to Stephenson's 1927 text, which of the following statements must be included for the term "vertebral subluxation" to be properly applied?
• Loss of juxtaposition of a vertebra with the one above, the one below, or both occlusion of an opening
• Occlusion of an opening
• Nerve impingement
• Interference with the transmission of mental impulses
A i only
B ii and iv
C ii and iii
D ii, iii and iv
E All of the above
Answer: E