What is one of the minimum requirements for adding a user?

One of the minimum requirements for adding a user in the context of DocuSign is language preference. Specifying a language preference helps to ensure that users receive communications and notifications in a language they understand, which is essential for usability and accessibility within the platform. This consideration aligns with providing a positive user experience, allowing users to fully engage with the application's features and functions without language barriers.

The other options, while they may enhance security or improve personalization, are not foundational requirements for adding a user. Social media verification, credit card information, and two-step authentication are typically associated with additional layers of security or user engagement but are not required to establish a user account in the system.