As I was reading your question, I thought, hmm, I think you'd have to do that in lesson...or several linked quiz activities...except lesson doesn't allow partially correct answers (at least 2.5 doesn't...that may not be an issue for you). With quiz, you can also set feedback for specific grade ranges and provide links if they get the "passing" score in each. Hope it works!
Teaching with Moodle
conditional answers in quiz
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