The largest strike in U.S. history hit what industry in 1959?

Here is the question :

THE LARGEST STRIKE IN U.S. HISTORY HIT WHAT INDUSTRY IN 1959?

Here is the option for the question :

• Railroad
• Steel
• Railroad
• Steel

The Answer:

And, the answer for the the question is :

Explanation:

[STC0017671]. The 1959 steel strike, which had almost 500,000 participants, was the biggest in American history. Members of the United Steelworkers of America protested over pay and changes to working policies for 116 days. It came to an end after the Taft-Hartley Act, which mandated a return to work after an 80-day “cooling off” period, was cited by the U.S. Supreme Court in its decision that the workers had to return.