An Organization Is Planning to Host an Application on the AWS

An organization is planning to host an application on the AWS VPC. The organization wants dedicated instances. However, an AWS consultant advised the organization not to use dedicated instances with VPC as the design has a few limitations. Which of the below mentioned statements is not a limitation of dedicated instances with VPC?

A) All instances launched with this VPC will always be dedicated instances and the user cannot use a default tenancy model for them.
B) It does not support the AWS RDS with a dedicated tenancy VPC.
C) The user cannot use Reserved Instances with a dedicated tenancy model.
D) The EBS volume will not be on the same tenant hardware as the EC2 instance though the user has configured dedicated tenancy.