The best strategy among the options provided to address rapidly rising governmental expenses is:
c. Make cuts to defense and education spending, and then increase tax rates to reduce the effect of increasing expenses in the federal government.
This option suggests a combination of reducing expenditures in areas that might be deemed less critical (like defense and education) while also looking to increase revenue through tax rate adjustments. This could potentially help to balance the budget and address the rising governmental expenses more comprehensively than the other options, which either involve delayed payments, increasing overall spending, or might lead to reduced services in important areas without addressing the revenue side effectively.