Given that Granny is $$5$$ times older than each of the three triplets, we know that the age of each triplet is $$120\div (5+3)= 15$$. So Cara, Cate and Chris were born in $$2004$$. 
Granny and the triplets Cara, Cate and Chris all have their birthdays today.  The ages of all four of them total $$120$$ years.  Granny is $$5$$ times as old as each of the triplets.  When were the triplets born? 
Options:
a) $$2000$$ 
b) $$2002$$ 
c) $$2004$$ 
d) $$2006$$ 
e) $$2008$$ 