Which of the following can be directly referenced in Pega?

The option that can be directly referenced in Pega consists of activities and data pages. Activities are used to define the processing logic and actions that can be performed on data within a Pega application. They can be called directly from various parts of an application, such as flows, when defining business rules or automating processes.

Data pages are designed for data retrieval and can pull in data from various sources, such as a database or external system. They facilitate data encapsulation and provide a structure for accessing that data across multiple contexts in your application. Since both activities and data pages are core elements that can be invoked directly within application development, their ability to be directly referenced is fundamental to building Pega applications.

Other choices like reports and dashboards, properties and user interfaces, and services and connectors, while integral to Pega's functionality, typically involve indirect references. Reports and dashboards are often based on the data defined in the system but are not directly referenced to execute functions. Properties and user interfaces define the structure and presentation of data but are generally managed through rules and configurations. Services and connectors represent integrations with external systems they must be established via rules and are not simply referenced directly for execution.