This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to avoid crossbreeding as a dog breeder
Choose a dog of the same breed.
To avoid crossbreeding, the main thing you have to do is to breed your dog with a dog of the same breed. Both dogs must be purebreds and have no other breed mixed into their bloodline in the past.

Options:
(A). Consider a breed and breed mix that best suits your breeding space and your business goals. Earn a percentage of profits from crossbreeding.;
(B). Plus, the exact laws are unknown from breeders. Therefore, finding a dog with a similar race, breed group, temperament, or color as an adoptee will be relatively difficult.;
(C). Purebreds are bred the same way. When you think about selecting a purebred dog, you'll need to think about whether the dog is of similar breed or a mixture of two races.;
(D). This can be determined through pedigree papers presented to you by the breeder. For example, if you have a dachshund, only breed your dog with another dachshund.;
The answer is:
(D).