The correct answer is option B, Steel Cables.
The Brooklyn Bridge is significant because it was the first suspension bridge built in United States with steel cables.
Explanation:
The Brooklyn Bridge is one of the oldest bridges of the United States. Its construction was started in 1869 and the bridge was completed in 1883. This was the first bridge that was built with the steel suspension cables. It was also the first fixed bridge crossing across the East River.
This bridge was made to join Manhattan and Brooklyn. As a first step in the construction of the bridge, the solid foundation was laid over the bridge and then the remaining construction took place.
This bridge connected two important cities and made people travelling easier. According to an estimate, over 580, 000 to 1 million inhabitants were increased in the Brooklyn over the course of 15 years since it was functioned.
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