Correct Answer:
Explanation/Reference:
Note:
* From scenario:
/ All content databases within the production farm must be set to read-only when patching and upgrading the farm.
* SQL Server Management Studio (ssms) is a software application first launched with the Microsoft SQL Server 2005 that is used for configuring, managing, and administering all components within Microsoft SQL Server.
* A farm is considered read-only if one of the following is true:
All content databases are set to read-only.
Service application databases are set to read-only.
* To set content databases to read-only by using SQL Server
1. Verify that the user account that is performing this procedure is a member of the db_owner fixed database role in each database.
2. Start SQL Server Management Studio.
3. Right-click the content database that you want to make read-only, and then click Properties.
4. Select the Options page, and, in the Other options list, scroll to the State section.
5. In the Database Read-Only row, click the arrow next to False, select True, and then click OK.
6. Repeat for all other content databases.
Reference: Run a farm that uses read-only databases in SharePoint 2013