Studies of Sex Differences in Spatial Ability in Rodent Species

Studies of sex differences in spatial ability in rodent species have revealed all of the following general observations EXCEPT

A) species that range over large habitats tend to exhibit less of a sex difference in hippocampal size than do species with smaller habitats.
B) the differential growth observed in the hippocampus is due to the influence of sex hormones.
C) hippocampal size can selectively increase during breeding season,when males expand their ranges in search of mates.
D) in some species,females possess larger hippocampi than do males.