Kurland's Study of Japanese Macaques Demonstrated That Close Relatives Had

Kurland's study of Japanese macaques demonstrated that close relatives had higher rates of interaction than distant kin and non-relatives because:

A) Close relatives were less likely to groom one another
B) Close relatives do not share genes
C) Close relatives spent a greater proportion of their time in proximity
D) Close relatives were less likely to respond to one another's distress calls