Documents you've uploaded for quiz creation can be shared directly with your students through Brian. That way, they get access not only to the quiz, but also to the underlying material — for example, to prepare for the exercise, look something up, dig deeper into the topic, or study for an exam.
Below the context field, you'll find the "Attached files" section. It lists all documents used to create this quiz.
Use the "Show attached files" toggle in the top right of this section to decide whether students get access to these files.
Note: This video is in German. An automatic English dub is available via YouTube — click the settings icon on the video and select "English" under Language.