Question

The main reason an author includes evidence in a case study is to help the reader

Answer 1

Draw a conclusion from the case study

Answer 2

The answer is (D) conduct an investigation from the case study. A wouldn't make sense, since there already is a case study. The author wouldn't just be adding to the case study because including evidence is something that would  bring out an investigation from it. D is the one that makes the most sense to me, hope this helps!