What do cells need to do between divisions to make sure that they dont just get smaller and smaller?

They need to divide
They need to grow
They need to copy their DNA
They need to slit their DNA

What do cells need to do between divisions to make sure that a full set of DNA gets passed on to each daughter cell?

They need to divide
They need to grow
They need to split their DNA
They need to copy their DNA

Answers must be correct please