—What does Liu Xiang do?

—He's a runner. He is ______ than others. [ ]

A. more athletic

B. more serious

C. athleticer

D. seriouser

一列哪一项不是实现职业生涯设计可操作性原则的必备条件？（）

A.目标的现实性

B.设计的完整性

C.计划的可行性

D.效果的可检查性