Which statement about john roebling is true?
1. he developed an inexpensive process for making steel.
2. he built sculptures out of steel to decorate central park.
3. he invented a way to spin steel wire into strong cables.
4. he designed the world's first steel-framed skyscrapers.
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Which statement about john roebling is true?
1. he developed an inexpensive process for...
1. he developed an inexpensive process for...
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