Answer:
Caps on debt-to-GDP ratios for the government’s annual budget
Step-by-step explanation:
Given that fiscal rules are measures set out to the government to curtail excessive spending, thereby preventing the need to borrow in which future generations are left to pay for.
HeIce, in this case, the correct answer is that the perfect example of a fiscal rule is "Caps on debt-to-GDP ratios for the government’s annual budget"
This is because such caps will prevent excessive borrowing.