Hey Taniuca,
Great follow-up question...let me see if I can help by adding to what Testluv said.
This question asks you which answer choice MUST BE TRUE, which is also something that CANNOT BE FALSE. One way to look at it is this way - say I were to say that:
In order to be admitted to Harvard Business School, one must have:
-a bachelor's degree
-a GMAT score above 500
-three compelling letters of recommendation
-a $125 registration fee
-three essays
Those are all then NECESSARY conditions to be admitted to be admitted to HBS. So if I were to say that:
Taniuca was admitted to HBS.
Then which of the following must be true?
A) Taniuca has a bachelor's degree
B) Taniuca submitted the $125 registration fee
C) Taniuca has a GMAT score above 500
D) All of the above
It's D, right? Because in order to get into HBS you would have had to meet all of those conditions.
Now...just because something is NECESSARY does not mean that it is SUFFICIENT! Meeting those qualifications alone will not get you into Harvard, just as saying that a number is greater than -8 is not sufficient to say that it's between -6 and 10. But we do know that if you get into Harvard then you MUST HAVE met those requirements, the same way that if a number is between -6 and 8 then it MUST BE greater than -8.
Looking at it the other way, if a number is NOT greater than -8, then there's no way that it qualifies to be between -6 and 10. It has to meet that qualification to even have a chance, just like you need to pay that Harvard application fee to even have a chance there.
I hope that helps - keep in mind that the MUST BE TRUE standard in this case just means that we need some thing necessary, not necessarily something sufficient.
Brian Galvin
GMAT Instructor
Chief Academic Officer
Veritas Prep
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