Clustering coefficients

The graph above represents the social network of a group of people in a research lab, illustrating co-authorship among the researchers. Based on this information, which of the following options is the approximate value of the average clustering coefficient: A) ⟨C⟩ = 0.2 B) ⟨C⟩ = 0.4 C) ⟨C⟩ = 0.6 D) ⟨C⟩ = 0.8 E) None of the above Original idea by: Matheus Lindino