relay model bd?

Question

Database

The teacher forces to break the table of the city into 2 (actual cities and tariffs). Is it right? For me it is better to keep the tariffs for calls in the city table. Explain why do it?

Answer 1

So that in the future, when there will be, for example, the division of tariffs by city districts, everything will not have to be redone much.

Answer 2

Let the teacher argue
We have to do with it?