The central atom doesn’t have eight valence electrons, so what’s drawn in part B isn’t yet a stable molecule and can’t represent the actual structure of ozone. An additional bond must be made to complete the full set of valence electrons on the central atom. This can be done by removing a lone pair of electrons from either one of the outer atoms and using it to make an additional bond between that atom and the central atom. Redraw the Lewis structure you drew in part B and show this additional bond.