The climbing season of 2006 was the deadliest on record for those attempting to conquer Mount Everest, the
world’s tallest mountain, as more people perished attempting to reach the summit in 2006 than in any other year.
Interestingly, most mountaineering experts attribute the high number of fatalities, almost all of which occurred in
the unforgiving “death-zone” above 26,000 feet, directly to the exceptionally good weather prevalent during the
2006 climbing season. Which of the following, if true, best helps to explain the conclusion of the mountaineering
experts?
• All of the forecasts were for extremely bad weather; the good weather was a significant surprise to all of the
climbers.
• The good weather prompted significantly more people than ever to try to reach the summit and enter the “deathzone,”
many of whom would have turned back at a lower altitude in poorer weather.
• The good weather caused the “death-zone” to have warmer temperatures and less intense winds than in recent
years.
• Modern equipment is particularly effective in protecting climbers from the elements in bad weather.
• Many accomplished climbers don’t attempt Mt. Everest during good weather because they feel it is not a challenge.
_________________

The world ain't all sunshine and rainbows. It's a very mean and nasty place and I don't care how tough you are it will beat you to your knees and keep you there permanently if you let it. You, me, or nobody is gonna hit as hard as life. But it ain't about how hard ya hit. It's about how hard you can get it and keep moving forward. How much you can take and keep moving forward. That's how winning is done!

B it is, too.

In stimulus:
X -> Y
Good weather -> More entrants in dead zone?

B is a missing assumption that affirms the conclusion.