Many different multiple choice questions can be more easily created by changing, for example, math numbers or variations of the same concept.
For example, for me with electrical questions, I can ask the same question for a copper conductor and for an aluminum conductor, requiring the learners to use different tables or rules in the Electrical Code. Or, I can ask them to calculate device or conductor sizes based on motors of different sizes.
Right now there is no easy way to duplicate the entire question and answers and references.