31. The reaction reactivity was studied in different solvent. Please indicate the best solvent for the following reaction to offer
the highest reactivity. 
(A) hexane
(B) chloroform
(C) ethanol
(D) water
(E) no difference
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統計: A(4), B(7), C(5), D(16), E(1) #1026916
統計: A(4), B(7), C(5), D(16), E(1) #1026916