单项选择题

(5) Recentstudiesonthemale-femalewagegappredictthateventhoughentry-levelsalariesformalesandfemalesinthesameoccupationarenearlyequalbecausewomen’smarketskillshaveimprovedvastly,thechancesoftheoverallgapclosingintheforeseeablefutureareminimal.Thisisduetoseveralfactorsthatarelikelytochangeveryslowly,ifatall.Animportantreasonisthatwomenareconcentratedinoccupation—serviceandclerical—thatpaylessthantraditionalmalejobs.Itispossiblethatmorewomenthanmenintheirtwentiesarehesitanttocommitthemselvestoayear-roundlifetimecareerorjobformanyreasons.Thereislingeringattitudeonboththepartofwomenandtheiremployersthatwomenarenotcutoutforcertainjobs.Notonlydoesthisattitudechannelwomenintolower-payingwork,butitalsoservestokeepthemfromtopmanagementpositions. Anothersignificantfactorinthewideningwagegapbetweenmenandwomenafterenteringtheworkforce,evenincomparablejobs,isthatwomenoftendropoutatcriticalpointsintheircareerstohaveafamily.Womenstillhavetheprimaryresponsibilityforchildrearing;eveniftheycontinuetowork,theyoftenforgoovertimeandpromotionsthatwouldconflictwithhomeresponsibilities.Theagesof25to35havebeenshownrepeatedlytobetheperiodwhenworkingconsistentlyandhardisvitaltoadvancementandjobsecurity.Thesearepreciselytheyearswhenwomenarelikelytohavechildrenandbegintoslideawayfrommeninearningpower.Consequently,awoman’sincomeismorelikelytobeseenassecondarytoherhusband’s. Whichofthefollowingisimpliedinthepassageasapartialreasonforwomen’sconcentrationincertainoccupations?

A.Social division of labor.
B.Social prejudice against them.
C.Employment laws.
D.Physiological weakness.