Social Recognition Between Female Mice Depends on the Protein Products

Social recognition between female mice depends on the protein products of four genes. Research by Choleris and colleagues (2004) demonstrated that in any single group of knockout mice in which one of the four components was lacking

A) the mutant mice couldn't distinguish a familiar mouse from a stranger.
B) the mutant mice refused to leave their nest without a familiar companion.
C) the strength of the social bond was weakened by a factor of almost exactly 25%.
D) the strength of the social bond was unchanged.