20. The Roman system of dual consuls is similar to modern: a. Presidential systems b. Checks and balances c. Military leadership d. Religious authority

The Roman system of dual consuls is similar to modern:<br /><br />b. Checks and balances<br /><br />The Roman system of dual consuls, where two consuls shared power and could veto each other's decisions, is similar to the modern concept of checks and balances. This system ensures that no single individual or branch of government has unchecked power, promoting a balance of power and preventing potential abuses.