gal_gitter wrote:
its a high level gmat prep question.
well, i guess your right and the answer is c because of possible common members.
The most tricky gmat question i have ever seen..
it may not be true that this problem is "high-level", as it doesn't require any complicated or extensive analysis.
difficulty is irrelevant, though; just LEARN THE THINGS THAT TRICK YOU so that you aren't fooled by them again!