Teddy Roosevelt Helped to End the 1902 Strike in the Anthracite

Teddy Roosevelt helped to end the 1902 strike in the anthracite coal mines by

A) using the military to force the miners back to work.
B) passing legislation making the miners' union illegal.
C) helping the mine owners to import strike-breakers.
D) serving as a labor mediator to have the miners' union and mine owners come to a negotiated settlement guaranteeing the right of the miners to unionize.
E) threatening to seize the mines and to operate them with federal troops.