You develop a SharePoint app to create an approval workflow for expense reports.
The app must collect user input during the workflow.
You need to use ASP.NET forms in the workflow.
Which form type should you use?

A.
Workflow modification form

B.
Workflow input form

C.
Workflow task form

D.
Workflow initiation form

Explanation:
Modification Forms
Modifications are options you present to users to change the workflow as it’s running on an item. You can then
create modification forms that enable users to specify the parameters of the modification.
Note:
Four types of forms can be used in a workflow: association, initiation, task, and modification.
Incorrect:
Not D: Association and Initialization Forms
Association and initialization forms are displayed for users to fill out before any workflow is actually started. You
can use these forms to enable users to set parameters and other information for the workflow before it starts.
Workflow Forms Overview