If we are using Agglomerate Hierarchical clustering with Single Linkage clustering, which clusters consisting of points on the x-axis should you merge next?
Cluster A: { (4,0), (2.5, 0), (3.7,0) }
Cluster B: { (-2,0), (-2.5, 0), (-1.25,0) }
Cluster C: { (0.75,0), (0.5, 0), (0,0) }