人口不断增长，但没有任何人会因此减少其所享受的公共物品的效用。这属于公共物品特征中的（）。

A.效用的不可分割性

B.受益的非排他性

C.取得方式的非竞争性

D.提供目的的非盈利性

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 millio

B．$-1 millio

C．$1 million。

D．$0.7 millio