Though I cannot see the graph, I'd wager that B. cliometrics is the correct answer. A. Hagiography refers to the lives of saints, a practice that would have little use for a graph (or for cause and effect relations, for that matter). C. Fishbone diagrams are mostly used for general causes of an effect; the use of data is less important. D. Multiple effects web would also point to more theoretical or abstract causes, while cliometrics is defined by the use of data.