Provide the missing reagent(s) or major organic product. The strongest and weakest acids are and respectively?
a) Reagent: A, Product: B, Strongest acid: II, Weakest acid: III
b) Reagent: B, Product: C, Strongest acid: III, Weakest acid: IV
c) Reagent: C, Product: D, Strongest acid: IV, Weakest acid: I
d) Reagent: D, Product: E, Strongest acid: I, Weakest acid: II