Explain the reactivity of acyl compounds in the order:
A. acid chloride`gt` amide`gt` anhydride`gt` ester
B. acid chloride `gt` anhydride `gt` ester `gt` amide
C. ester `gt` acid chloride `gt` anhydride `gt` amide
D. ester `gt` anhydride `gt` acid chloride `gt` amide