The ________ service is targeted at organizations with multiple users or systems that use AWS products such as Amazon EC2, Amazon SimpleDB, and the AWSManagement Console.
Amazon RDS
AWS Integrity Management
AWS Identity and Access Management
Amazon EMR
Explanations:
Amazon RDS is a managed relational database service and is not specifically targeted at managing multiple users or systems.
AWS Integrity Management is not a recognized AWS service and does not relate to managing access for multiple users.
AWS Identity and Access Management (IAM) allows organizations to manage user access and permissions across AWS services, making it suitable for organizations with multiple users or systems.
Amazon EMR is a managed cluster platform for processing big data but does not specifically focus on user or system management across AWS products.
As I see it, the answer is:
AWS Identity and Access Management