Which of These Findings Casts Doubt on the Specificity Theory

Multiple Choice

Which of these findings casts doubt on the specificity theory of pain?

A) Researchers have failed to find specific skin receptors devoted to relaying pain.
B) Phantom limb pain occurs in 70% of amputees.
C) Injury can occur without pain, such as that experienced by the soldiers at Anzio beach.
D) All of these are challenges to the validity of the specificity theory of pain.