Calculate the concentration of CO₃²⁻, H₃O⁺, and OH⁻ in a 0.135 M solution of H₂CO₃ (Ka₁=4.3×10⁻⁷ and Ka₂=5.6×10⁻¹¹).

a) [CO₃²⁻] = 0.135 M, [H₃O⁺] = 2.0×10⁻⁸ M, [OH⁻] = 2.5×10⁻⁸ M
b) [CO₃²⁻] = 2.5×10⁻⁸ M, [H₃O⁺] = 0.135 M, [OH⁻] = 1.0×10⁻⁸ M
c) [CO₃²⁻] = 1.0×10⁻⁸ M, [H₃O⁺] = 2.5×10⁻⁸ M, [OH⁻] = 0.135 M
d) [CO₃²⁻] = 0.067 M, [H₃O⁺] = 1.35×10⁻⁸ M, [OH⁻] = 1.7×10⁻⁸ M