TOEFL Listening: TPO-TOEFL听力TPO - CM21IVM84HUKSR1SR$

In Walden, Thoreau describes some benefits of trains. What benefits does the professor mention? A. Trains helped people feel more connected to their national culture. B. Trains made life more convenient for many people. C. Trains stimulated the imagination in new ways. D. Trains cost less to use than other modes of transportation.