Suppose a researcher has collected information from college students and young adult offenders, with the goal of comparing the number of different illegal substances each group has tried. The dataset has each drug listed as a variable, along with whether the individual is currently in college or currently incarcerated. There are 15 distinct substances that are included in the dataset, with "Yes, I have tried this substance" coded as a "1" and "No, I have not tried this substance" coded as a "0".

Determine whether it is best to create a 1) Count Occurrence Composite Variable, 2) a Composite Variable of Sums, or 3) a Composite Variable of Averages. List your choice, describe the process you would follow to complete the task, and explain why you feel your choice is best.