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Walden

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What is the iron horse?

WALDEN-CZGUWN

What is the "iron horse" referred to in the following passage:

When I hear the iron horse make the hills echo with his snort like thunder, shaking the earth with his feet, and breathing fire and smoke from his nostrils…

A

A farmer's tractor

B

A carrier train

C

A team of work horses

D

A work truck

E

A passenger car