Job shadowing is an elicitation process that is a part of job observation. In this process, the observer is required to keep an eye on those workers whose work routine is down and who are unable to explain their work. The observer has to understand their work process for better assessment of the modifications of the work required.
The following are the approaches for this technique:
Passive/Invisible. In this approach, the observer does not ask Questions from the user about his work while the user is working.
Active/Visible. In this approach, the observer does ask Questions from the user about his work even when the user is working.

Explanation
Atomic is a characteristic of a quality requirement that means it cannot be broken down further into smaller requirements. It helps to ensure that the requirement is clear, concise, and complete. Owned, mapped, and allocated are not characteristics of a quality requirement, but rather attributes or relationships of a requirement. References: BABOK Guide v3, page 40; CCBA Mock Test, question 20

Requirements documentation is not a work product but a formal document that describes the requirements for the solution scope.
Solution scope is a set of capabilities a solution must deliver in order to meet the business need.
Answer C, A, and B are incorrect. These are examples of a work product.