Questions: By what may project benefits may be impacted? Workflow reports Project communications Changes in customer preferences Risk management plan

The answer is: Changes in customer preferences.

Explanation for each option:

1. Workflow reports: These are typically used to track the progress and efficiency of a project but do not directly impact the benefits derived from the project.
2. Project communications: While important for ensuring that all stakeholders are informed and aligned, project communications do not directly impact the benefits of the project.
3. Changes in customer preferences: This directly impacts project benefits because if customer preferences change, the project may need to be adjusted to meet these new preferences, which can affect the overall benefits.
4. Risk management plan: This is used to identify, assess, and manage risks but does not directly impact the benefits of the project.

Summary: Project benefits may be impacted by changes in customer preferences, as these changes can necessitate adjustments to the project to ensure it meets the new needs and expectations of the customers.