Madison wants to answer the research question “how did the vietnam war affect the politics of the united states in the 1970s? ” which would be the best source or combination of sources for her to use? interviews of older relatives in her family, some who fought in the war and others who did not several digital news articles and documentaries from the 1970s, plus a recent book on the topic one good recent book that answered her questions and reflected her own point of view two good books from the 1970s that offered opposing points of view on the subject

The correct answer is B) several digital news articles and documentaries from the 1970s, plus a recent book on the topic.

The best source of combination of sources for Madison to use in responding the question “How did the Vietnam War affect the politics of the United States in the 1970s?”, is several digital news articles and documentaries from the 1970s, plus a recent book on the topic.  

This is the best option because if Madison gets use of several news articles she is going to have many opportunities and versions of what happened in Vietnam. These different perspectives augment the possibility of being accurate in her answer. If she also gets the support of documentaries from the 1970s, she gets more information to be detailed. If she uses a recent book on the topic, she has an actual or updated fact that resulted from new investigations, interviews, and information with people that could not talk about the war at that time because they were working for the military or a government agency.  

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.