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Please help me What made the railroad expansion possible because thousands of miles of track were made of this? A. oil B. copper C. gold D. steel

Please help me What made the railroad expansion possible because thousands of miles of track were made of this? A. oil B. copper C. gold D. steel
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4 votes
Please help me

What made the railroad expansion possible because thousands of miles of track were made of this?

A. oil

B. copper

C. gold

D. steel

User Betamoo
by
7.9k points

1 Answer

4 votes

The answer is D. Steel.

User Mahdi Younesi
by
8.3k points
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