A diagram with 5 bacterial shapes appears. A is a corkscrew shape. B is a set of 4 identical shapes linked together in a square shape. C is an approximate oval or barrel shape, sitting horizontally. D is a set of identical shapes linked together into a long chain. E is a set of squiggly lines linked together to form an indistinct shape. Which drawing in the figure possesses an axial filament? a b c d e