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:Many aspects of successful programs are being tackled through studies ranging from social acceptance and carbon
accounting to silvicultural management strategies (Cai et al. 2011; DesRochers et al. 2006, 2007; Henkel-Johnson 2013; Neumann et al. 2007).
Category: