You are a professional level SQL Sever 2008 Database Administrator in an international corporation named Wiikigo. You are experienced in managing databases in an enterprise-level organization, optimizing and sustaining the database life cycle. In the company, your job is to implement solutions on security, troubleshooting, deployment and optimization. A SQL Server 2008 instance is managed by you. The security requirements should be designed for a new database application. A code segment is utilized by the application, and the code segment includes the following components: A method that the registry is accessed on the SQL Server, a method that the file system is accessed on a network file server, and a class definition that public static fields are utilized. SQL CLR integration is utilized by the code segment, and the code segment is implemented as a single assembly. Since you are the technical support, you are required to make sure that the application should be successfully deployed to the instance.    Which action will you perform?（）

• A、The SAFE code access security should be utilized for the assembly.
• B、All public static fields should be replaced with public fields.
• C、All public static fields should be utilized with public static read-only fields. And then the assembly shouldbe registered by utilizing the regasm.exe utility before deployment.
• D、All public static fields should be replaced with public static read-only fields. And then the EXTERNAL_ACCESS code access security should be utilized for the assembly.