Tensile engineering stress-strain curves through failure are depicted below. Which specimen features the most ductile response? Engineering Stress, MPa 1800 1600- 1400 1200- 1000- 800- 600- 400- 200- Aluminum Alloy 2024-T81 1340 Steel, Water-Quenched & Tempered at 370°C Stainless Steel (18-8) Magnesium Structural Steel (Mild Steel) 0 0.04 0.08 0.12 0.16 0.20 0.24 Engineering Strain Stainless Steel (18-8) Structural Steel (Mild Steel) 1340 Steel, Water-Quenched & Tempered at 370°C Magnesium Aluminum Alloy 2024-T81