Turn on the television or open a magazine and you _____ advertisements showing happy families. [ ]

A. will often see

B. often see

C. are often seeing

D. have often seen

依照《环境影响评价法》的规定，对北京市朝阳区某公路建设项目的环境影响报告表，北京市朝阳区环保局应自收到环评文件之日起( )日内，作出审批决定并书面通知建设单位。

A．15
B．30
C．45
D．60