Which of the following statements best associates the concept of "centrality" with its metric in social network analysis?

a$.$

Centrality evaluates the diversity of ties that a node maintains with nodes in different communities or clusters within the network, often represented by the betweenness centrality metric.

b$.$

Centrality represents the tendency of a node to occupy a central position within a community or cluster, commonly measured by the eigenvector centrality metric.

c$.$

Centrality quantifies the number and importance of connections a node has within the network, usually assessed through the closeness centrality metric.

d$.$

Centrality measures the tendency of a node to form connections with other highly influential nodes within the network, typically quantified by the degree centrality metric.