GMAT Critical Reasoning (CR) | Re: Everyone who has graduated from TopNotch High School has an

I am surprised that I picked the right answer for this CR. I picked (C)

My reasoning is below

Everyone who has graduated from TopNotch High School has an intelligence quotient (IQ) of over 120. Most students with an IQ of over 120 and all students with an IQ of over 150 who apply to one or more Ivy League universities are accepted to at least one of them.

The statements above, if true, best support which of the following conclusions?

1]Every graduate of TopNotch High School with an IQ of 150