Final answer:
In the film 'Dances with Wolves,' Kevin Costner's character embraces his Sioux name instead of remaining as John Dunbar.
Step-by-step explanation:
In the film Dances with Wolves, Kevin Costner's character initially goes by the name John Dunbar. However, as he spends more time with the Sioux tribe, he embraces his Sioux name and identity as Dances with Wolves. So, the answer to the question is b. He embraced his Sioux name.