Chars or Graphs are the most common. You could also use Venn diagram or pie chart.
Question:
What investigation ?
<span>I read the story about the history of the South that Professor Rasco assigned.</span>
I think the answer to this question is that it paved way to the popularity of mystery fiction. Also, a significant result of Doyle's detective mysteries is their focus on crime investigation and paying attention to details that would help in crime-fighting - which encouraged awareness during his time about it.