A bank has $100 million in assets in the 0 percent risk-weight category, $200 million in assets in the 20 percent risk-weight category, $500 million in assets in the 50 percent risk-weight category, and $750 million in assets in the 100 percent risk-weight category. This bank has $57 million in core (Tier 1) capital. What is this bank's ratio of Tier 1 capital to risk-weighted assets? A. 3.68 percent B. 7.60 percent C. 18.25 percent D. 5.48 percent E. None of the options is correct.