In theDesigning and Implementing Enterprise Network Assurance (300-445 ENNA)curriculum, transaction monitoring is essential for validating complex, multi-step user workflows. When an engineer with limited scripting experience needs to monitor a OneDrive file download process, the ThousandEyes ecosystem provides several tools to simplify the creation of robustTransaction tests.

The correct approach is to leverage all available resources, makingOption Dthe definitive answer. First, theThousandEyes Recorder IDE(Option B) is a critical tool for non-scripters. It allows an engineer to perform the actual workflow—navigating to OneDrive, logging in, and initiating the download—in a browser environment on their local machine while the tool records every click and keyboard entry. The Recorder automatically generates the corresponding JavaScript code using theThousandEyes transaction library. Second, the platform provides pre-builtscript templates(Option A), such as those forOffice 365andOneDrive, which include baseline logic and best practices for these specific services. Third, the officialtransaction-scripting-examplesrepository on GitHub (Option C) is a maintained source of code snippets. This is particularly useful for implementing advanced logic, such as aretry mechanism, which ensures that the test does not report a "failure" due to a transient network hiccup but instead attempts the action again before triggering an alert.

As shown in the provided exhibit, a typical script uses import statements from @thousandeyes and selenium-webdriver to control the browser. By combining theRecorderfor the basic flow, aTemplatefor service-specific nuances, andSample Scriptsfor logic enhancements like retries, the engineer can deploy a highly reliable assurance test without deep coding expertise. Therefore, all three actions are highly recommended and valid within the ENNA implementation framework.