下列哪項(xiàng)是估算的輸入? A. 來(lái)自管理的估算,工作分解結(jié)構(gòu)和項(xiàng)目計(jì)劃 B. 來(lái)自管理層的估算,風(fēng)險(xiǎn)評(píng)估和團(tuán)隊(duì) C. 團(tuán)隊(duì),工作分解結(jié)構(gòu)和歷史記錄 D. 團(tuán)隊(duì),項(xiàng)目計(jì)劃和風(fēng)險(xiǎn)評(píng)估