1 -> B) TESTIMONIALS
. Testimonials are related to, as the name suggests, testifying to what you believe. If the stars believe that's the best option, they would tell other people that, testifying to their beliefs.
2 -> A) NAME CALLING
is using broad accusations and negative attacks in order to bring down the reputation of an opponent. Calling people names, usually bad ones, is a form of trying to bring down someone's reputation.
3 -> D) GLITTERING GENERALITIES
is using wide-spread universal terms that do not deal with the specific issues at hand. It makes people be familiar with the speech, but not necessarily are they related to the subject at hand.
4 -> C) VOLUNTEERISM. passing out campaign pamphlets or phoning people with encouragement to vote for a candidate is volunteerism. People who are not getting paid to do a given task are volunteers.