Scrooge’s old boarding school,the day when his sister Fran took him home after school,Christmas party he was at a few years later,Christmas Eve with his fiancée who ended their relationship, and then that she found her true love and got married.
B or D because they seem really reasonable
I think it is A) Reference
A root word is a portion of a base that do not stand alone and have no meaning for themselves.... but,a base word is a word that does not have any other words added either at the beginning or its ending....