I'm not sure I understand why, if B) is an overstatement, E) is not an overstatement as well. If we consider that other factors besides the rate of air replenishment in the cabin can affect the likelihood of contracting airborne illness, then we also have to consider that other factors can affect th...

Here's how I approach eliminating D: The argument says any illness caused by stress is treatable "only" through stress. D is making the assumption that some conditions that can be treated by medicine are not "also" treatable through stress reduction. That is not necessary to the ...