Thirty observations in a data set were partitioned by the 3-means clustering method and the following information from Data Mining is available. Cluster Summary Inter-Cluster Distances Cluster Y Size Average Distance Cluster Cluster 1 7 Cluster 2 Cluster 3 Cluster 1 8 0.775 Cluster 1 0 1.852 1.204 Cluster 2 17 0.996 Cluster 2 1.852 0 0.954 Cluster 3 5 0.277 Cluster 3 1.204 0.954 0 Cluster 2 is O a. the largest and the least heterogeneous O b. the smallest and the most homogenous O c. the largest and the most heterogeneous Od. the largest and the most homogenous