What is NOT a major benefit of the railroad industry? A. New markets are opened up on both coasts
B. Materials for building grew other industries
C. Travel is much safer when riding a train
D. Food and goods can be shipped much quicker and cheaper at long distances

A. new market are opened up on both coast.

I'm not sure

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

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