Which one of the following could be the assignment of departments to floors?

There is nothing in the question that suggests that there is any specific sequence to each floor, only that certain departments will be in certain floors. The H/I rule #2 is really the only somewhat sequential restriction and this is between floors not across them. Why is it then that we can eliminate choice E using rule #2? Is it not possible that H and I are directly above and below each other in choice E given that there is nothing mandating the order of the departments in the middle floor? I interpreted each line as a grouping, not as a sequence, and since I is the only department in the bottom line, then it could it not have been below H? What in the prompt tells us that the order listed for each floor is a sequence and not a group?