An RPA developer needs to perform a code review on a process to ensure best practices were used. During the code review,

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An RPA developer needs to perform a code review on a process to ensure best practices were used. During the code review, the developer discovers that the workflows cannot be easily tested and some refactoring of the code is required.
Based on best practices, which approach is recommended?

A. Create unit tests only for the workflows that need to be refactored.
B. Split the logic into reusable workflows and use arguments when needed.
C. Rewrite all the workflows using best practices.
D. Use manual end-to-end testing and refactor only the tested workflows.