An alkyl magnesium halide is reacted with carbon dioxide under very low pH (acidic conditions). Which of the following are true regarding this reaction?   I) Carbon dioxide acts as the nucleophile in this reaction II) Carboxylic acid is one of the products III) Grignard reagent acts as the nucleophile  
(A) I only
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 32. Separation, Purification, and Structural Analysis of Organic Compounds