In small groups – as opposed to large ones – individuals are

Considering the choices; 
A. more likely to take more than their equal share.
B. less anonymous and thus less cooperative.
C. less likely to take more than their equal share.
D. more open about their conflicts.

Answer; C
In small groups as opposed to large ones, individuals are less likely to take more than their equal share. 

Explanation;
According to the Ringelmann Effect, the tendency for individual members to become less productive increases as the size of a group increases.  If individuals are more then it means more chaos, communication, more bureaucracy and more of everything, that will slow down things.