Hi guys: I read the chapter "Clarity of meaning" Know vs. Unknown in Manhattan SC, where it says that
... "the original sentence is certain about an outcome but the answer choices indicate uncertainty (or vice versa), or where the original sentence discusses an hipotetical situation but the answer choices present it as an actual situation (or vice versa)....When you see words of uncertainty (should, would...) in the answer choices you must check whether the meaning of the original sentence requires doubt or certainty"...

However, I has just found a case in which THE ORIGINAL SENTENCE HAS THE WRONG MEANING (pls. see below)

Canadian scientists have calculated that one human being should be struck every nine years by a meteorite, while each year sixteen buildings can be expected to sustain damage from such objects.

(A) one human being should be struck every nine years by a meteorite
(B) a human being should be struck by a meteorite once in every nine years
(C) a meteorite will strike one human being once in every nine years
(D) every nine years a human being will be struck by a meteorite
(E) every nine years a human being should be struck by a meteorite

OG explanation says: What this sentence says is not what it logically intends...D. Correct ...will be struck is free of the unintended connotations of should be struck.

So be careful!