问题：

[单选]

Your network contains a Network Policy and Access Services server named Server1. All certificates in theorganization are issued by an enterprise certification authority (CA) named Server2. You have a standalonecomputer named Computer1 that runs Windows 7. Computer1 has a VPN connection that connects toServer1 by using SSTP. You attempt to establish the VPN connection to Server1 and receive the followingerror message: A certificate chain processed, but terminated in a root certificate which is not trusted by thetrust provider. You need to ensure that you can successfully establish the VPN connection to Server1. 
What should you do on Computer1?（）

A . Import the root certificate to the user s Trusted Publishers store.
B . Import the root certificate to the computer s Trusted Root Certification Authorities store.
C . Import the server certificate of Server1 to the user s Trusted Root Certification Authorities store.
D . Import the server certificate of Server1 to the computer s Trusted Root Certification Authorities store.