问题
Which one of the following is NOT a trade-off decision that must be made in the development of the project plan？
A:Whether to use skilled or unskilled laborers.
B:The amount of profit vendors should make versus the profit other vendors have received in the past.
C:Manufacturing in-house or sub-contracting ort the work.
D:The importance of cost versus quality.
B:The amount of profit vendors should make versus the profit other vendors have received in the past.
C:Manufacturing in-house or sub-contracting ort the work.
D:The importance of cost versus quality.
正确答案是：
