The Reaction,Cr(NH₃)₆³⁺(aq)+ 3 En(aq) $\leftrightarrows$ Cr(en)₃³⁺(aq)+ 6 NH₃(aq),where En Represents Ethylenediamine,has a Small Value for Ethylenediamine,has

The reaction,Cr(NH₃) ₆³⁺(aq) + 3 en(aq) $\leftrightarrows$ Cr(en) ₃³⁺(aq) + 6 NH₃(aq) ,where en represents ethylenediamine,has a small value for the enthalpy change, $\Delta$ H_rxn,yet the free-energy change is large because __________

A) the reaction rate is fast.
B) the entropy change is large and positive.
C) the enthalpy change is large enough to matter.
D) the entropy change is large and negative.
E) ethylene diamine has amino groups that are stronger bases than ammonia.