20 mL of a 0.2 M Al₂(SO₄)₃ solution is mixed with 20 mL of a 0.6 M BaCl₂ solution. Determine the molarity of A1³⁺ ions in the solution.
A. 0.20 M
B. 0.25 M
C. 10.3 M
D. 0.10 M