The correct answer is: A. closeness
Closeness is a measure of the strength of the ties between actors in a social network. It is often measured as the average path length between all pairs of actors in the network. A network with high closeness is one in which all actors are directly linked to one another through cohesive bonds.
Cohesion is a measure of the overall strength of the ties in a social network. It is often measured as the sum of the weights of all the ties in the network. A network with high cohesion is one in which all actors are strongly connected to one another.
Centralization is a measure of the concentration of power in a social network. It is often measured as the fraction of all ties in the network that are connected to a single actor. A network with high centralization is one in which a small number of actors have a lot of power.
Path length is a measure of the distance between two actors in a social network. It is often measured as the number of ties that must be traversed to go from one actor to the other. A network with low path length is one in which all actors are close to one another.