Read the following article and answer the question by choosing from the options.

After we dropped off Cade at the gym , we found her new room and then her chair ( they sit at big round tables ) . We watched as all the other kids came in and found their seats . I saw lots of them getting their pictures taken ( we took ours at home ) , and a few mom 's with tears .

What may be the reason for the event described ?
Pick from:
a). None of the above choices ..
b). It was their first day of school ..
c). It was their first day of college ..
d). It was their first presentation .....A:
b).