英文一問???(英文高手請進)

*要個人來翻譯，禁用辭典
留意以下文段，解答問題，並翻譯整文段。
文段:
Students see themselves as overweight and sickly and are prone to thoughts of suicide and despair as they _(2)___ the academic ladder,a survey has found.
問題:
Which of the following best suits the blank (2) in line 2?
A.climb
B.crawl
C.creep
D.walk up