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I suggest you encourage her to talk to recruiters as well as request information about ROTC. The services will tell her what qualifications interest them, and they have videos about training and so forth. They’ll also give her things like keyrings and t-shirts ... we still get stuff from the NC National Guard, after #1 son filled in a card at the air show.
In my opinion, your daughter has nothing to lose by considering what the armed services could offer her, and what she might contribute to the service. Gathering information and exploring possibilities (don’t forget the Coast Guard, which is not DoD) doesn’t cost anything but time, and it is not any kind of commitment.
I don’t believe in discouraging my children’s interest in any career. No matter what possibility is mentioned, I respond with, “That’s a possibility. We can look into what the opportunities and requirements are.”