TOEFL Listening: ETS-TOEFL听力机经 - LD33PQ13K5YU9P30P$

Why does the professor mention that the arches of the Eiffel Tower resemble railway bridges? A. To show how difficult it was to build an iron tower in the 1880s B. To emphasize the structural strength of the Eiffel Tower C. To imply that railway bridges were the inspiration for the design of the tower D. To give a reason why the Eiffel Tower was disliked