To solve this question, the user needs to have an understanding of the different services/servers in Microsoft SQL Server and their purposes.

SSAS (SQL Server Analysis Services) is used for creating and managing OLAP (Online Analytical Processing) databases, which are used for data analysis and business intelligence.

SSIS (SQL Server Integration Services) is used for data integration and migration, including ETL (Extract, Transform, Load) processes.

SSRS (SQL Server Reporting Services) is used for creating and managing reports based on data stored in a SQL Server database.

C. SQL RDBMS (Relational Database Management System) is the correct option for hosting OLTP (Online Transaction Processing) data. OLTP databases are optimized for the rapid processing of transactions, such as inserting, updating, and deleting data. SQL RDBMS is designed to manage relational databases, which are commonly used for OLTP applications.

Therefore, the correct answer is:

The Answer is: C