1. The problem asks which measure evaluates the cost associated with uncertainty in decision-making. 2. EVPI (Expected Value of Perfect Information) measures the value of having perfect information to eliminate uncertainty. It quantifies the worth of reducing uncertainty. 3. EOL (Expected Opportunity Loss) calculates the expected loss due to making a suboptimal decision under uncertainty. 4. Hurwicz criterion is a decision rule balancing optimism and pessimism but does not directly measure cost of uncertainty. 5. EMV (Expected Monetary Value) is the average payoff considering uncertain outcomes but not specifically the cost of uncertainty. 6. Therefore, the measure that explicitly quantifies the cost of uncertainty is EVPI. Final answer: a. EVPI