Your network contains an Active Directory domain named contoso.com. You have a Group Policy object (GPO) named GPO1 that contains several user settings. GPO1 is linked to an organizational unit (OU) named OU1. The help desk reports that GPO1 applies to only some of the users in OU1. You open Group Policy Management as shown in the exhibit. (Click the Exhibit button.) Dear visitor, you need to Register or Login to view links on Certify Chat. You need to configure GPO1 to apply to all of the users in OU1. What should you do? A. Modify the Security settings of GPO1. B. Disable Block Inheritance on OU1. C. Modify the GPO status of GPO1. D. Enforce GPO1.