I'm gonna have to go with the letter D
If i'm not wrong it's objective information
Answer:
I don't think it's possible to change your name because I haven't been able to change mine.
Answer:
The complete subject would be SpongeBob SquarePants's best party trick.
Explanation:
The subject, or thing completing the action, is SpongeBob SquarePants. But the complete subject would be his best party trick because it gets into one of his distinct attributes.