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Bunuel
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The expansion of the Mongol empire depended not only on the Mongols' rigorous training and the discipline of their soldiers but also they implemented a highly organized supply and communication network among their many widespread armies and then enabling them to receive their current orders and some replenishment of their weaponry.


A. they implemented a highly organized supply and communication network among their many widespread armies and then enabling them Incorrect

B. on their implementation of a highly organized supply and communication network among their many widespread armies, who were then able Correct

C. because of their implementation of a highly organized supply and communication network among their many widespread armies, who they enabled Incorrect

D. on their implementing of a highly organized supply and communication network among their many widespread armies and they enabled them Incorrect

E. implementing a highly organized supply and communication network among their many widespread armies, enabling them Incorrect

correct parallelism - ................not only on .............................but also on.................
eliminate A, C & E

D - implementing uses wrong, they introduce parallelism error and also they refers to what?

Answer - B
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