Simon Has Just Started a Job with the Police Department

Multiple Choice

Simon has just started a job with the police department. His director has given him the last six months of test results from four local precincts. Simon has organized the results as four data series and needs to display the trends in a graphic format.
-It's difficult to read the exact scale on some of Simon's data.Adding ____ would make it easier to read.

A) a legend
B) major tick marks
C) colors
D) more numbers