The shaded portion in the graph above is represented by

• A.y + x - x³ ≥ 0, y - x ≤ 0
• B.y - x + x³ ≥ 0, y - x ≤ 0
• C.y + x - x³ ≤ 0, y + x ≥ 0
• D.y - x + x³ ≤ 0, y + x ≥ 0
• E.