Navy Nurse ROTC

How competitive, and what is the acceptance rate for a student applying for a Navy Nurse ROTC Scholarship? My daughter applied and was just rejected. I am surprised because, based on requirements, her credentials are quite good (i.e. ACT score is 31, GPA of 4.0, very involved in school and community as volunteer and leader, and also very athletic.)
We are looking for potential reasons and answers why she was rejected. Navy has not been responsive to questions the last few months. Appreciate any insight that can be given.