【单选题】
A、project was expected to cost $6 million for 3 months.At the end of 1 month, you use earned value as a performance management tool and get the following information:BCWP=$1.5 million,BCWS=$2.5 million,ACWP=$2.2.million. What is the schedule variance A、$0.3 million.B、$-1 million.C、$1 million。D、$0.7 million.