Joseph Rézeau

"Est-il possible de supprimer plusieurs éléments de la banque de contenus ?"

Malheureusement non, on ne peut que les supprimer un par un (ce qui peut devenir assez pénible).

I've been reading this longish discussion and, if I understand the OP correctly, what he wants is a so-called branching feature for his question. Why not use the Lesson activity, which has the branching feature included?

PS.- As I've often said in this forum, it would make things so much easier to understand if the OP would please provide a real-world example, rather than cats and dogs.

Marcus wrote "I am currently working on a new unrelated question type with the hope of completion within the next 12 months."

Now, that's a teaser.

@Claudine,

You could try the solution I provided in this post:

1. Go to Dashboard / Site administration / Appearance / Themes / Boost
2. Click the Advanced Settings tab
3. In the Raw initial SCSS box, add the following CSS rule:
   #page-mod-lesson-view .fcontainer *, *::before {
       box-sizing: content-box;
   }

This will align everything in the lesson questions to the left. So the TRUE and FALSE buttons should get displayed entirely.

Tell us if that works.

PS. You wrote "The students don't like change!" In my long, past experience as a teacher always looking to innovate, most teachers don't like change either.