题目内容：
Besides the backdrop of bad employment news and a cooling economy， which of the following causes the PLA to raise this year's recruitment quota? __________
A．The TV drama Soldiers' Sortie is high in the rating B．The PLA wants to attract high-quality personnel to meet the need of hi-tech sector in the nation's defens
C．The PLA is increasing the size of the arm
D．Some students who have already volunteered to sign up may change their mind
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