Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation? CaCl2(aq) + H2C2O 4(s) ⇌ CaC 2O2

A. Calcium chloride solution
B. Concentrated hydrochloric acid
C. Ethanol
D. Ethanedioc acid
E. Aqueous ammonia

Correct Answer: Option E

E. Aqueous ammonia