Select All That Apply

Select all that apply.Which of the following are hypotheses used to explain the relation of itching to scratching?

A) We scratch to remove the possible irritant that may be bothering us.
B) Scratching is a naturally pleasurable experience, which then masks the itch.
C) Scratching is a natural reaction to severe pain, which is how the body perceives an itch.
D) Tissue damage caused by scratching initiates an autoimmune response, which acts to reduce the risk caused by the original irritant.