Although the charts are not visible, we can deduce the correct answer logically. Limits in credit risk management are designed to prevent over-concentration. Having "too many counterparties" or being in "too many sectors" (Options A and B) represents diversification, which is generally positive; limits are instead set to cap excessive exposure to a single counterparty or sector. As a regional bank based in Missouri, its primary operating environment is the US, so a country limit on the US market (Option C) would not be practical or meaningful. However, managing and capping cross-border exposure to foreign nations, such as Costa Rica, is a standard risk management practice, especially for a regional bank. Therefore, a country limit because of its exposure to Costa Rica (Option D) is the most logical answer.