Final answer:
McCarthy was unobstructed due to his fear-mongering, but his removal was a result of bipartisan efforts and the Army-McCarthy hearings. option b is answer
Step-by-step explanation:
Senator Joseph McCarthy was initially unobstructed due to his aggressive tactics and fear-mongering. He made unsupported accusations of disloyalty and Communist infiltration in the government, using unfair tactics and spreading fear without providing evidence.
However, McCarthy's downfall was ultimately a result of bipartisan efforts and the Army-McCarthy hearings. During these televised hearings, McCarthy's use of intimidation and innuendo was rejected by the American public, leading to his loss of public support and his eventual condemnation by the Senate. option b is answer