Marc is a claims manager for Millstone Insurance. It has experienced significant development of workers compensation claims over the last two years, and Marc has been asked to work with the data science team to determine the cause. Because they do not know what factors are causing the development, the team suggests that they begin with an unsupervised learning technique that does not have a defined target variable. The technique will identify groups of claims that share attributes. Which one of the following techniques is the data science team suggesting? Select one: A. Cluster analysis B. Nearest neighbor analysis C. Classification tree analysis D. Text mining