Communications has become a ‘catch-all’ major which can be differently defined at different schools, so I would look at what type of focus the departments at each of the three school has to offer…
Some Communications degrees are off-shoots of journalism/rhetoric, some are more electronic media-focused, while others lean more toward Corporate Communication/PR.
Have your student do some deep digging into the department - courses on offer, plus degree requirements - and then see if there are concentrations or professors that resonate with what they have in mind when thinking about a Comm major.