TOEFL Reading: ETS-TOEFL阅读机经 - Y367HA17HV4GW33XL$

According to paragraph 4, young female Belding's ground squirrels may remain closer to where they were born than do males in order to A. avoid inbreeding with their male siblings B. avoid competition with other females for territory C. save energy they need to defend their burrows D. benefit from their mothers' help