Your answer would be ABCB because in the poem the first sentence(O, what is that whimpering there in the darkness?) Is A and the second sentence(Let him lie in my arms. He is breathing, I know.) Is B And the third sentence(Look. I'll wrap all my hair round his neck' - 'The sea's rising,) Is C And the last sentence is B again(The boat must be lightened. He's dead. He must go.') Its ABCB becuase the first sentence doesn't rhyme with any other part Of the poem and B rhymes to times becuase in the parts "'Let him lie in my arms. He is breathing, I know." And "The boat must be lightened. He's dead. He must go." These both parts rhyme with the words know and Go And C(just like A) doesn't rhyme with anything else. Hope this Helped