Since1975thenumberofwomeninupper-levelmanagementinAmericancorporationshaveincreasedby25percent;femaleexecutives'salaries,however,stilllagbehindthoseoftheirmalecounterparts.（）
(A)haveincreasedby25percent;femaleexecutives'salaries,however,stilllag
(B)hasincreasedby25percent,howevermuchtheirsalarieslag
(C)haveincreased25percent;femaleexecutives'salaries,however,stillhavelagged
(D)hasincreasedby25percent;femaleexecutives'salaries,however,stilllag
(E)haveincreased25percent;theirsalaries,however,stilllag