Answer:
A pedigree
Explanation:
A pedigree is the record of descent of an animal, showing it to be purebred. With a pedigree, a dog breeder would easily have proof of his purebred dogs' heritage.
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C. it cannot be created nor destroyed only transferred
The experiment conducted by Paul was not a waste of his time and resources even though he could not accomplish the experiment he initially prepared to conduct. The reluctance of the penguins to eat burgers even though they were starving and losing weight pointed towards the fact that they do not find junk food appealing. It could be concluded from their reluctance that they will eat only their normal diet rather than something they have never eaten before.