It is found on the Select Actions Page of the wizard...
Note one should NOT select all of those options in one fell swoop..there is a proscribed order for using them. I normally cover that sequence as part of my normal class.
To select cleanup actions and set options
On the Select Actions page, select the cleanup actions to perform by adding them to the Selected Actions list.
To add a cleanup action to the Selected Actions list, select the action in the Cleanup Actions list, and click Add.
In the Selected Actions list, specify the order of cleanup actions. The order can affect results. The first action in the list is performed first. To change the order, highlight an action and click the up or down arrow.
In the Selected Actions list, select the action for which you want to specify settings.
Under Cleanup Parameters, specify the settings to use for the selected action. For more information about each cleanup action, click one of the following links:
Delete Duplicates
Erase Short Objects
Break Crossing Objects
Extend Undershoots
Apparent Intersection
Snap Clustered Nodes
Dissolve Pseudo Nodes
Erase Dangling Objects
Simplify Objects
Zero-Length Objects
Weed Polylines
To review detected errors before correcting them, under Options, select Interactive. To have AutoCAD Map 3D correct all detected errors without further input from you, select Automatic.
Note Simplify Objects and Weed Polylines are not interactive operations. AutoCAD Map 3D makes these changes automatically during cleanup.
Click Next.