A company wants to migrate its on-premises Microsoft SQL Server database server to the AWS Cloud. The company has decided to use Amazon EC2 instances to run this database.
Which of the following is the company responsible for managing, according to the AWS shared responsibility model?

A. EC2 hypervisor
B. Security patching of the guest operating system
C. Network connectivity of the host server
D. Uptime service level agreement (SLA) for the EC2 instances