A third party is a part that doesn’t fit the criteria of belonging to the two dominant parties of the US. In simple terms, it is any party that isn’t the two dominant parties (republican and democratic).
When President Truman took a hard line against striking workers in the years immediately following World War II, he:
"had little understanding of the plight of laborers in the post-war years."
During the first months of his administration, he became involved in a struggle between coal miners and railroad workers. It took several meetings, and fierce arguments, to get them to agree, and end the strike.
Answer: Renewable resources
I think it's A because slavery wasn't abolished in Washington DC until 1862.
I would put this at false, no one believed that blacks were incapable of fighting, and they were used shortly into the war.