Pro-animal rights activists argue that animal cruelty and suffering have been widely documented within slaughterhouses. Which of the following do they claim are typical abuses?
a. Improper stunning so that animals are shackled and bled out when they are fully conscious
b. Head injuries from improper captive bolt stunning
c. Kicking punching and beating animals by slaughter house workers
d. All of the above have been documented as slaughterhouse abuses