Answer:
C. Shows breed traits
Step-by-step explanation:
A goat or sheep that is sound will possess or exhibit the characteristics that are well known of its breed. That is to say, a sound goat or sheep will have physical attributes that confirm to the traits that is associated to it's breed which includes height and weight at every stage of growth, as well as every other features known of the breed.
A goat or sheep that has features that deviates from the expected breed traits could possibly have issues.