Anne is designing a new measure to capture 4-5-year-old children's non-verbal communication skills during a 30-min interview. Anne aims to capture three important aspects of non-verbal communication skills during the interview, as below. (1) Eye gaze behaviours - how frequently children look at important communication cues; (2) Use of hand gestures - how frequently children use hand gestures to help them communicate; (3) Use of facial expression - how frequently children use facial expressions to help them express emotion. Anne has collected data from a group of 15 children. By the end of the data collection, Anne wants to have a single score to indicate children's non-verbal communication skills (the frequency of eye gaze, hand gestures, and facial expressions, which together imply greater communication skills). What does Anne need to do first? O a. None of the other options O b. Sum or average the scores on all 3 behaviours O G. Reverse-score behaviours 1 and 3, then sum or average the scores on all 3 behaviours O d. Reverse-score behaviour 2, then sum or average the scores on all 3 behaviours