The 1938 radio broadcast of war of the worlds made millions of listeners believe that martians were invading earth; however most listeners didn't believe the story was real. those outcomes ultimately to support which research model?

It was the hypodermic-needle model. This model which is also known as hypodermic-syringe model, transmission-belt model or magic bullet theory is a model of communications. It suggests that an intended message is received directly and fully accepted by the receiver. It was largely considered obsolete for a long time. 

A. democrat, republican, whig, other.(the democratic and republican parties are the main 2 american political parties, the whig party was popular among the early presidents, and the “other” option allows for outliers)