Which line best highlights bilbo baggins’ unusual youthfulness?

when mr. bilbo baggins of bag end announced that he would shortly be celebrating his eleventy-first birthday with a party of special magnificence

the riches he had brought back from his travels had now become a local legend . .

at ninety-nine they began to call him well-preserved; but unchanged would have been nearer the mark.

mr. baggins was generous with his money, most people were willing to forgive him his oddities and his good fortune.