I successfully ( on time and without crying ) dropped Ham at school for her first day of Kindergarten . Yesterday was really the first day but it was only for 30 minutes with Mom and Dad . This slow ramp up is killing me !

Question with options to choose from: What might be the reason I was proud of myself for not crying ?
Options are:
(I) It was very hard to see my daughter growing up so fast and starting kindergarten .
(II) Because Dad was supposed to take Ham to school but Mom always has to do everything .
(III) Because the slow ramp was killing me and , having to deal with it made me want to cry .
(IV) I was tired of having to go to the school day and day and it was making my nerves jagged .
(I)