Question

Which of these is a case of selective breeding? A. To increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mothers. B. Over time, more milk cows at the diary farm began to produce larger amounts of milk. C. A gene was identified that increased milk production. This gene was added to calves in the womb. D. The genome of a group of cows was analyzed to identify the gene for milk production.

Answer 1

I believe the answer is C.

Answer 2

"To increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mothers." this would be selective breeding because they are selecting the which cows they want to breed. 
-hope it helps :3