Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…personality and a general tendency to engage in high-risk/externalizing behaviors, such as drinking, illicit drug use, risky sexual behaviors, and other antisocial behaviors (Conrod et al., 2010; Finn, Sharkansky, Brandt, & Turcotte, 2000; Krueger et al., 2002; Mackie, Castellanos, & Conrod, 2011).
Category: