TOEFL Reading: ETS-TOEFL阅读机经 - 07WKT3KOO8R358IBL$

Which of the following is NOT identified in paragraph 4 as a reason the practice arose of making "Germanic chieftains" generals in the Roman high command A. It helped reduce the number of possible enemies against the empire. B. It helped make it possible to maintain an imperial military force of sufficient size. C. It was cheaper than recruiting and training Roman generals. D. It gave Theodosius confidence that his generals would remain loyal while he focused on other matters.