Which of the Following Is the Best Example of Assimilation

Which of the following is the best example of assimilation?

A) Naming your dog Barney after the famous purple Barney on TV,even though you know that's not your dog's name.
B) Changing the name of your dog after finding out that a classmate has a dog with the same name
C) Pretending that your dog is a horse
D) Naming the first dog you meet,"Spot," and then calling all other dogs that you meet "Spot"