She had two questions. The first:
Why did you go to college?
The second, a corollary to the first:
What did you find most difficult to adjust to, from high school to college?
For what it's worth, my answers to those questions are: My parents expected me to; and, learning to study. I did not, in fact, really learn to study in college, or indeed until after I'd graduated. Not until I took some online courses through Foothill did I develop the actual discipline to study.
So, anyway, why did you go to college?