Final answer:
To verify the success of RUM enablement in a web application, checking for the RUM JavaScript tag within the application's pages is the most direct method. The presence of this tag indicates that user interactions can be monitored and analyzed.
Step-by-step explanation:
To check that a web application is successfully enabled with Real User Monitoring (RUM), you would opt for option (c) Check for the presence of the RUM JavaScript tag. This tag is a snippet of code that needs to be inserted into the pages of the web application. It collects data on how real users are interacting with the application and sends this data back to the RUM provider for analysis.
If you see this tag when viewing the page source or notice requests being made to the RUM provider's server in the browser developer console, you can be confident that RUM is enabled. Analyzing user session metadata and accessing server-side logs can provide insights once RUM data has been collected but are not direct methods for verifying RUM enablement. The most direct method is to look for the RUM JavaScript tag within the page code.