With the current sequestration issue at our door, it is more likely that they will not be offered an enlistment option.
Gojira on this site can prove that. Her DS didn't voluntarily leave last yr from NROTC, he was dis-enrolled 6 weeks prior to commissioning for being 8lbs overweight, and handed a $143K bill since he was scholarship. Last I knew he wasn't given the option of paying it back over 10 yrs., it was much less time than that. They hired a military attorney to allow him to at least serve enlisted, and they lost.
A few yrs back DS's AFROTC friend on scholarship dis-enrolled at the C2C point and he was handed a 40K plus bill. No enlistment option.
I know of another poster here who when they commissioned they received an ED with a follow on for UPT. They toyed with the idea of trying to get out of the UPT slot, and was told, if he went that route, didn't get picked up for his new AFSC, they could/may hand him his walking papers AND a bill for the AFA. That stopped him in his tracks.
Finally, if that C1C took that loan, and if it is like the loan AFROTC cadets get, look at the fine print. The devil is always in the details. That low APR jumps up to @19% if they leave before their commitment is over, be it dis-enrollment or separated.
Now you can be on the dime for 160K + 25-35K at 19%.
In this economy, if you are thinking of leaving make sure you have a job lined up that can afford you the ability to pay back big bucks for yrs to come.
If that is the desire, I wouldn't worry about telling the folks. I would worry about how I could afford to go to MickeyD's after paying back @200K on a monthly payment plan without declaring bankruptcy at 22.