Should be used when you want to reinforce the importance and significance of your arguments, especially when you are not an expert on your topic. be sure to stress the competence and lack of bias of your sources, and emphasize their recent nature.

explanation: the line "to save the day, harry must get past a scary three-headed guard dog" from the summary best justifies the conclusion that harry potter and the sorcerer’s stone was influenced by ancient greek mythological literature. the three other choices had nothing to do with ancient greek literature - and the words "three-headed guard dog" are what makes that choice the correct answer.