Why did the Roman Government divide into the 3 branches, what was the purpose?

Question 4 options:

While the three branches were more challenging to manage, it was necessary in order to govern such a large empire.


They did not split it up, all the power of the Roman Republic stayed in the hands of the emperor, Tiberius.


It is much simpler to manage 3 branches, than 1 large branch.


This was done to ensure that one branch did not became more powerful than the others.