Connecting two or more boards?

Hello!

I’m interested in connecting couple of Mikrotik boards?
How would you guys do it?

Board A (internet) > Board B (receive internet from A, and transmmiting signal for C, also giving internet to it’s area user) > Board C (receive internet from B, transmiting for D, also giving internet to it’s area users)

How would you configure each, what’s the easiest way?

Thanks.