Is he seeking a during year internship ? Internships usually happen in summer and most don’t get til at least after second year.
I would not let internship access drive this. Today many kids are finding them via the internet. My kid had 20 interviews and 5 job offers coming from Tuscaloosa.
The first internship is hardest. Then it gets easier.
If he wants to work year round there’s enough in range of all three. Even IU.
But just summer - where you go won’t matter.
If it did IU wouldn’t be ranked where it is - at the top of these three.