In the Context of the Research Conducted by Latané,Williams,and Harkins

In the context of the research conducted by Latané,Williams,and Harkins (1979) on group productivity in the United States,which of the following is a factor that contributed to social loafing?

A) An increase in efforts by individuals when they work in groups as compared to when they work by themselves.
B) A reduction in efforts by individuals when they work by themselves as compared to when they work in groups.
C) Reduced efficiency resulting from a lack of coordination among workers' efforts resulting in lack of activity or duplicate activity.
D) Improved coordination among workers' efforts resulting in increased efficiency and productivity.