is pretty good and his commnents hit the mark. Wilf's caution is wise! Nevertheless, the best answer to give to the college student is:
1. choose an area study that is if personal interest, doesn't much matter which.
2. choose the dominant language in that area.
Positive results that come from that approach include the fact that learning a second foreign language is easier than learning the first and the ability to operate cross-culturally tends to transfer from one area to another.

Cheers

JohnT