Final answer:
The true statement regarding artificial selection is that breeders can control which animals mate. They cannot dictate what mutations may appear in the offspring. So the correct option is A.
Step-by-step explanation:
The true statement about artificial selection is that breeders can control which animals mate. This process occurs when humans select which plants or animals to breed to pass on specific traits to the next generation. For instance, a farmer may selectively breed cows that produce large quantities of high-quality milk and avoid breeding those with less desirable traits. This form of selection can lead to genetic changes in the offspring as the selected traits are passed down.
However, breeders cannot control what exact mutations will appear in the offspring. Mutations occur spontaneously and are random by nature, so while artificial selection can increase the likelihood of certain traits being represented, it does not determine the occurrence of mutations. Therefore, the correct answer is A, as breeders can control the mating of animals, but they cannot control the appearance of mutations in the offspring.