题目内容：
根据短文，回答题
The expression "step back in time at least a hundred years" (Para. 2) is intended to convey the idea that_______.
[ A ] college classrooms often remind people of their college life
[ B ] critical thinking was encouraged even a century ago
[ C ] a hundred years ago, desk arrangement in a classroom was quite different
[ D ] there is not much change in the college educational idea over the past hundred years
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