Question 4 really threw me off and I was hoping that someone could help me out. from the question stem. I haven't been able to write out hypotheticals that actually show or disprove the answers...
For Answer C, I ended up with
O or U on Monday and Tuesday, X on Wed, NS block on Thursday and PT on Friday. However, there is also that rule that states that U and X are the only jobs that can take an entire day each, and in this case O, the floater, violates the rule. I can't seem to be able to rearrange the sequence or come up with an alternate hypo though. Any advice will be greatly appreciated!