Which of the following options allows the user to visualize all constraints in Autodesk Inventor?

The option that allows the user to visualize all constraints in Autodesk Inventor is "Show All Constraints." This feature enables users to make all the geometric and assembly constraints visible in the modeling environment. Visualizing constraints is crucial for understanding how different components interact with each other and ensuring that assemblies function correctly. When constraints are visible, users can easily identify any potential issues with the assembly, such as conflicting constraints or over-constrained components.

In contrast, the other options offer different functionalities. The function to "Hide All Constraints" would simply remove the visibility of constraints from the workspace, which is useful if one wants to declutter their view but does not aid in visualization. "Toggle Constraints" is intended to switch between showing and hiding constraints, which may not necessarily allow the user to see all constraints simultaneously. "View Constraints" implies a more limited approach, likely referring to selecting specific constraints rather than visualizing all of them at once. Thus, the ability to see all constraints at a glance facilitates better control and troubleshooting in assembly design.