If I were writing a reference letter for somebody I thought had three excellent traits - serious, smart, kind - and two moderately positive traits - careful and helpful, and my goal was to write a letter that led to the greatest likelihood the person would be successful, I should: a. Exclude the moderate traits because people usually use the averaging model of impression formation b. Include the moderate traits because people usually use the summation model of impression formation c. Exclude the moderate traits if I know the decision makers are very risk averse, because cautious people tend to use the averaging model of impression formation d. Include the moderate traits if I know the decision makers are very risk seeking, because risk takers tend to use the summation model of impression formation