What does this line from the book mean? ~ "the vitality of his illusion has gone beyond daisy~ beyond everything."?

I believe that this sentence means that Gatsby created this perfect image of Daisy which doesn't resemble reality anymore. He loved her for so many years that each time he thought about her, he added something new, more, better to his image of her, until she became perfection in his mind. 

You are required to do this by yourself

The answer to that question is b