Amazon RDS is a managed service provided by AWS, which means that AWS handles the underlying infrastructure, including the installation and patching of the operating system. Therefore, options A and D are not the responsibility of the company using RDS. Option C is also not relevant as it pertains to physical hardware connections, which is abstracted away in a cloud service like RDS. The correct answer is B, as the company is responsible for creating IAM (Identity and Access Management) policies to control administrative access to the RDS service, ensuring that only authorized personnel can manage the database instances.