If you’re looking for what college opens the most doors, I would say that depends on where the graduate wants to start a career. Schools have different reputations in various companies/areas of the country.
If the graduate will have a career in SoCal, then it is my opinion that Harvard and Stanford would be the most prestigious to the largest number of employers.
I’m not as connected with school reputations in other areas of the country.
For internships specifically, companies tend to draw from schools where they have established relationships, so it may be worth having the student decide where they want to intern and finding out where that employer typically gets interns.
And as flyer points out, networking is probably just as important as school.
