澳大利亚东南部的墨累——达令河流域是澳大利亚重要的[ ]

A．粗放牧羊带

B．绵羊与小麦混合带

C．粗放牧牛带

D．羊、牛与经济作物经营带

You are running a project for a customer based on a cost reimbursable contract with the following terms: Target costs, $1000000; fix fee, 100000; benefit/cost sharing, 80/20; price ceiling, 1200000. Which is the PTA (point of total assumption, break point)of the project ？（）

A．$1300000

B．$1500000

C．$80000

D．$1125000