An AWS Root Account Owner Is Trying to Create a Policy

Multiple Choice

An AWS root account owner is trying to create a policy to access RDS. Which of the below mentioned statements is true with respect to the above information?

A) Create a policy which allows the users to access RDS and apply it to the RDS instances
B) The user cannot access the RDS database if he is not assigned the correct IAM policy
C) The root account owner should create a policy for the IAM user and give him access to the RDS services
D) The policy should be created for the user and provide access for RDS