【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.