Teenager’s Grades

I have a high school senior. Going away to college. Has financial awards based on his GPA.
C – His current grade in Pre-Calculus is a “D”
T – He can do better. This is disappointing. He’s going to lose his scholarship. He’s spending too much time with his girlfriend instead of studying.
F- Fearful Upset
A-Warn him, Offered to get tutor.
R- ??

Can I be concerned without being judgemental? It just makes me cry. Other grades are steady. I want to show up as a concerned momma.