Which three steps must be taken for a List View to support modifying cell data and adding elements to an array?

To enable a List View to support modifying cell data and adding elements to an array, it's essential to ensure the row iterator is properly configured to handle these operations. The correct step involves providing the row iterator's toAdd property. This property specifies the action for adding new elements to the array represented by the List View.

By setting the toAdd property, you instruct the row iterator how to handle the addition of new entries effectively. This allows users to interact with the List View not only to modify existing data but also to insert new items seamlessly into the structure representing the array.

In this context, while the other steps might seem relevant, they do not directly facilitate the modification of cell data or the addition of new elements. For instance, making the row iterator editable is a part of allowing data modification but does not alone achieve the objective of adding elements to an array. Similarly, the inclusion or removal of additional buttons is not inherently necessary unless they are specifically configured to perform certain actions regarding data changes. Thus, focusing on the toAdd property is crucial for achieving the desired functionality in the List View.