Persian rulers divided their vast empire into smaller regions ruled by loyal

The correct answer is B. Satraps

Explanation:

Satarps were the governors of different provinces in Ancient Persia. They were used during the old Achaemenid Empire as well as in the more contemporary Sasanian Empire.

In a more modern sense they were 'viceroys' of the King, ruling over a large land and population under his name. The Satarps was responsible for administration, collecting taxes, local defense and intelligence as well as providing support to the King when needed.

Interestingly, even the Byzantine Empire used the word 'Satarp' to describe their governors.