QUESTION $10$

If the single linkage criterion is used, what are the first two steps for hierarchical clustering of the standardized data shown on the right side of lecture slide #$17?$

A$.$ Cluster Person $1$ and Person $2,$ then add Person $3$ to the cluster.

B$.$ Cluster Person $1$ and Person $2,$ then cluster Person $3$ and Person $4.$

C$.$ Cluster Person $1,$ Person $2,$ and Person $3,$ then add Person $4$ to the cluster.

D$.$ Cluster Person $2$ and Person $3,$ then add Person $4$ to the cluster.

E$.$ Cluster Person $1$ and Person $3,$ then add Person $2$ to the cluster.