Stimulus:
Tigers can be classified as either good hunter or bad hunter, but not both. Good hunters can chase and kill prey that weigh up to half their body weight. All good hunters have a high muscle-to-fat ratio. Most wild tigers are good hunters, but some domestic tigers are good hunters as well.
If the statements above are true, which one of the following must also be true?
(A) A smaller number of domestic tigers than wild tigers have a low muscle-to-fat ratio.
This answer choice is incorrect as the stimulus mentioned nothing about low muscle to fat ratio
(B) All tigers that have a high muscle-to-fat ratio can kill prey that weigh up to half their body weight.
The stimulus says that good hunter tigers have high muscle to fat ratio, not all tigers, so not given
(C) Some tigers that have a high muscle-to-fat ratio are not good hunters.
Stimulus does not mention this
(D) Some tigers that have a high muscle-to-fat ratio are domestic.
I chose D as the stimulus as this answer choice ties with the "some domestic tigers are good hunters as well" and the "All good hunters have a high muscle-to-fat ratio" components of the stimulus
(E) All tigers that are bad hunters have a low muscle-to-fat ratio.
low muscle to fat ratio is not mentioned in the stimulus