prep test 32 section 1 #18
Until 1985 all commercial airlines completely replenished the cabin air in planes in flight once every 30 minutes. Since then the rate has been once every hour. The less frequently cabin air is replenished in a plane in flight, the higher the level of carbon dioxide in that plane and the easier it is for airborne illnesses to be spread.
Q: which one of the follwing is most strongly supported by the information above?
b) People who fly today are more likely to contract airborne illnesses than were people who flew prior to 1985..
e) in 1980 the level of carbon dioxide in the cabin air on a two-hour commercial airline flight
was lower than it is today on a similar flight..(answer)
Why not B is the answer?
I think B is right inference..
See how easy that was to do, O.P.?
B) might be ok in the absence of E), which you'll notice distinguishes "commercial airline flight" from "people who fly", thus tailoring the scope appropriately in accordance with the stimulus.
"people who fly today" includes military aircraft, private planes, hang-gliders, etc.
Furthermore, you don't know if it's really easier to get sick today, since, even if it were true that it's easier for airborne illnesses to spread, it could be that in the past two decades, people in general are healthier than they used to be, and so even with less cabin air replenishment, there's less disease available to spread in the first place. Likewise, the airlines may acknowledge the problem and take countermeasures, like handing out masks to passengers, thus making B's conclusion that today you're more likely to contract illness wrong.