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:…around marketing and sale of certain products arise regarding perpetuation of undesirable institutions and practices, such as those that may reinforce sociocultural biases related to gender, class, ethnicity, and color (Dixon and Telles, 2017; Fleming and Jones, 2013; Glenn, 2008; Karnani, 2007).
Category: