Answer:
Well, if this were to be [tex]BC[/tex]= Before Christ, the years would go back.
Step-by-step explanation:
And that's why the question is trying to trick you. So in 1990 BC the person is 15 years old. 5 years later, the same person is now 10 years. 5 years back is the order of the BC concept. Hope this makes sense!
