Answer:
>1877: The Great Strike
>1886: The Haymarket Affair
>1892: The Steel Strike
>1911: Triangle Fire
After the war he became a national hero, and the Republicans nominated him for president in 1868. A primary focus of Grant's administration was Reconstruction, and he worked to reconcile the North and South while also attempting to protect the civil rights of newly freed black slaves.
in which time through out the years different threats accord
It's definitely A as one answer, but I'm unsure about the other answer. But I can almost 100% say that C is most likely the second answer. I hope I helped in some ways!