Which line from The Fellowship of the Ring shows an element of fantasy?

Which line from The Fellowship of the Ring shows an element of fantasy?

A) There was a splendid supper for everyone; for everyone, that is, except those invited to the special family dinner-party. This was held in the great pavilion with the tree.

B) Bilbo left his place and went and stood on a chair under the illuminated tree. The light of the lanterns fell on his beaming face; the golden buttons shone on his embroidered silk waistcoat.

C) They all feared that a song or some poetry was now imminent; and they were getting bored. Why couldn’t he stop talking and let them drink his health?

D) He stepped down and vanished. There was a blinding flash of light, and the guests all blinked. When they opened their eyes Bilbo was nowhere to be seen.