The business is the content or general message of a conversation or what the conversation is about. Option A is correct.
Conversation may be defined as a talk between two or more individuals in which the convey thoughts, feelings, and ideas, ask and answer questions, or even news and information is exchanged. So, in a conversation were a message is delivered with an intention, the real message will have a specific content known as business.
The central idea of the poem is how her mother died and took her courage with her, something her child does not have. The child states how since she is dead she took it with her to her grave which is why they said she does not need it anymore. The mother left behind a golden brooch that she wore since it would remind her child of her even when she is gone. But the child wants her courage, not her brooch.
What do you mean by this question?