Arsenic trisulfide (As₂S₃) occurs naturally as the orange-yellow colored mineral orpiment. As₂S₃ is a highly insoluble substance with a Ksp value of 2.90×10⁻⁷². Calculate the solubility of As₂S₃ in g/100mL. (Molar mass of As₂S₃ = 246.04 g/mol)

• A. 2.12×10⁻¹⁷ g/100 mL
• B. 1.87×10⁻¹³ g/100 mL
• C. 6.25×10⁻¹⁵ g/100 mL
• D. 4.75×10⁻¹⁴ g/100 mL