GRE Text Completion: Maggoosh-GRE填空Maggoosh - 7I055Q0K25IT2H20Y

While she was unfailingly ____________ to her superiors, such slavish obedience and unquestioning sycophancy never helped her ascend beyond the role of a lackey. A. glib B. impertinent C. obliging D. obsequious E. deferential