Consider the reaction represented by the following
CaCl_2(aq) + H₂C₂O_4(s) ⇋ CaC₂O_4(s) + 2HCl_aq
Which of the following would dissolve the precipitate of CaC₂O₄ formed?

• A. A stirring of the mixture vigorously
• B. Adding more calcium chloride solution
• C. Increasing the concentration of the ethanedioic acid
• D. Adding concentrated hydrochloric acid