(A) Under Napoleon the French were not able to organize an adequate supply system, and it
(B) The French being unable to organize an adequate supply system under Napoleon
(C) For the French under Napoleon, to be unable to organize an adequate supply system
(D) The inability of the French under Napoleon to organize an adequate supply system
(E) The French inability under Napoleon of organizing an adequate supply system.
Solution:
Pronoun + Idioms
In A, antecedent of it is unclear. it can refer to supply system which is not the intended meaning.
In B, the usage of being is awkward here.
In C, the sentence structure For....., to be.... is awkward.
In E, inability of is unidiomatic. inability to is idiomatic.
In D, The inability of the French to organize was a major cause , the sentence structure is proper and phrases are idiomatic. Hence, D is the best choice.
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