The correct answer is: put down.
The phrase “put down” means to suppress or stop something forcefully. In this case, the strike by the workers was suppressed by the government with a heavy hand. This could mean that the government used violence or intimidation to stop the strike, or that it passed laws that made it difficult for workers to strike.
The other options are not as accurate. “Got down” means to descend or lower oneself. “Set down” means to place something down or to make a statement. “Taken down” means to remove something from its place or to lower something from a high place.
I hope this helps!