Q6

I also don't understand why E isn't correct. Doesn't both 5th and 2nd HAVE to go after 7th street because theres no afternoons left because monday and tuesday are taken and wednesday they don't clean?

Never mind I see now it says 'could be false' not 'must be false' so does that mean they're looking for the answer that could be also be true too?

Great question. Let's look at (E). The correct answer is something that could be false, and this means that the four incorrect answer choices are answers that must be true. (E) must be true because both 2nd and 5th must go after 7th, so we know that 7th street will be before 2nd street no matter what in this question's scenario. Because the one correct answer choice we're looking for could be false, this means that the other four answer choices CANNOT be false (that is, they must be true). Hope this helps. Let us know if you have any other questions!