Interest rate risk—the risk that bond prices will decline when market interest rates rise—is best minimized by buying issues with short maturities, which makes choice C correct. The reason is that shorter-maturity bonds generally have lower duration, meaning they are less sensitive to changes in market rates. When rates rise, a short-term bond’s price typically falls less than a long-term bond’s price because investors will receive principal back sooner and can reinvest at the higher prevailing rates earlier.

Choice A (revenue bonds) is incorrect because revenue vs. GO classification primarily relates to credit/repayment source, not interest rate sensitivity. Revenue bonds can still be long-term and can still have meaningful interest rate risk. Choice B (bonds at a discount) is not the best minimizer of interest rate risk; discount pricing affects yield relationships, but maturity and duration are the key determinants of price volatility due to rate moves. Choice D (highest yield available) is incorrect because higher-yielding munis may carry greater credit risk, longer maturities, call features, or other risks; chasing yield does not minimize interest rate risk and can increase it.

This question targets a core SIE bond concept: price and interest rates move inversely, and the magnitude of price movement depends heavily on time to maturity (and related duration). Investors who are particularly concerned about rate increases often favor short-term municipal notes or shorter maturities to reduce price volatility. While call features and coupon levels also affect rate sensitivity, “short maturities” is the most direct and consistently correct answer for minimizing interest rate risk on the exam.