Which of the following best illustrate the system of checks and balances for the national government?
i. congress overrides a president's veto.
ii. the supreme court decides which laws are constitutional.
iii. the president issues an executive order to veto judicial decisions.
iv. the house and senate can override judicial decisions.

The option that best illustrate the system of checks and balances for the national government is OPTION I. Government is divided into three basic branches by the constitutions. This separation of power serves to prevent any one person from having too much power, this creates a kind of check and balance in the government. Each of the branches of the government can override a decision made by another. The overriding of a president's veto is an example of checks and balances.

Ok , hopefully this app

Pressure and heat that's what i think( don't report if wrong)