Drag and Drop

Hi,

I've recently been confronted with the following situation, which has currently no solution in the Drag & Drop activity.

In a certain drop zone DZ0 I need to accept as correct one out of two draggable elements, E1 and E2.

If I set that drop zone to "This drop zone can only contain one element", I can drag either E1 or E2 into that zone, not more than one, of course. But then, the total score for the activity expects 2 elements to be dragged into drop zone DZ0. When only one element has been dragged, it's impossible to achieve a full correct score.

Here are a couple of drop and drag activities that I'm using to check student's understanding of the documents they are reading.

1. English Bill of Rights of 1689 - https://sites.berry.edu/csnider/2020/06/16/new-hp5-content-english-bill-of-rights-1689/

2. Japense Americans in World War II - https://sites.berry.edu/csnider/2021/06/07/new-h5p-drag-and-drop-activity/

Hi, I'm using "Drag and Drop" game, how can I know what image was draged to the drop zone at any given time.
Do I need to add some listener to follow the actions in the game?