Aslap on the back is more painful than a pat on the back because a slap triggers:
a. the release of endorphins.
b. more intense neural impulses.
c. the release of serotonin.
d. more neurons to fire, and to fire more often.

option B

Explanation:

slap on the back is considered to be a strong enough stimulus to generate a nerve impulse which causes more pain because of sudden rush of neuronal impulse.

Any slap can give you a physical injury unintentionally. and slap on back ban results in back pain and in some cases leads to some serious condition so its better to avoid this.

the psychological impact of incarceration

explanation:

a brief interference with a person's freedom of movement with a duration that can be measured in minute.