What is a third party?

A political party that includes both major political parties
A political party that discourages political participation
A political party that opposes the two major political parties
A political party that calls for the elimination of the federal governmen

His is the name of the group in the house of representatives that, in 1947, began hearings to expose communist infiltration in american life. unfortunately, a good deal of the evidence they used was based on hearsay and conjecture, meaning innocent people were harmed by their findings.