Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-C KEY PERFORMANCE FACTORS May 31, 2001 Expected B Maturity 6/16/03 Blended Coupon 4.3763% Excess Protection Level 3 Month Average 7.82% May, 2001 7.70% April, 2001 7.59% March, 2001 8.17% Cash Yield19.67% Investor Charge Offs 5.45% Base Rate 6.51% Over 30 Day Delinquency 4.84% Seller's Interest 8.52% Total Payment Rate14.20% Total Principal Balance$58,203,705,030.43 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,958,014,468.94