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:The experiments were repeated either (i) including or (ii) not including the Suppes’ constraints described in CAPRI [28], and independently using 5 distinct optimization scores and regularizators, namely standard (i) log-likelihood [21], (ii) AIC [1], (iii) BIC [32], (iv) BDE [18] and (v) K2 [11], leading to a final number of 86, 400, 000 different configurations.
Category: