question: Q:A study designed to investigate the friendship patterns of abused children was conducted by filming the interactions of the children and later having three raters view the footage and rate each child's pattern of behavior on a conflictual-behavior scale with values ranging from "constant conflict" to "minimal conflict." Which of the following kinds of reliability is most critical to this study, given the methodology used to measure the variables?? 
  A:Coefficient-alpha reliability;B:Alternate-forms reliability;C:Inter-rater reliability;D:Test-retest reliability