Life In 19x19

this move was played by kobayashi koichi
$$c
$$ -------
$$ | . . . . . . .
$$ | . . O . . . .
$$ | . . O X X b .
$$ | . X X O O X .
$$ | . X O . . # .
$$ | . d . O a . .
$$ | . . . c . . .
i looked it up on kogo's joseki dictionary and they recommend A B or C as moves for white, clarifying that D ...