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. Womenarekeptfromtopmanagementpositionspartlybecausethey __________ .