Thread:Correct answer for questions 2 and 3? (1)

All three choices for questions 2 and 3 in the quiz are listed as "incorrect". I'm thinking that one of them should be correct (and I think it's generally understood that a quiz question has a right answer)...or is it really the case that none is correct...in which case:
 * we could add "None" as a possible answer for all of the questions.
 * we could make it clear in the instructions that it may be that a format is NOT fully proprietary, open, or free.

Thanks, Alison