单选题 Impressed by the women's desire to learn, Sachs and Brown helped them hammer out a business plan.
A. hang out B. set out C. figure out D. work out

【正确答案】 D

【答案解析】[解析] 划线词hammer out“苦心想出，推敲出”。A项hang out“挂出”；B项set out“出发，开始”；C项figure out“合计为，解决”；D项work out“设计出，做出，计算出”。所以，D项应为正确答案。