Aspartoftheirtherapy,youngpoliovictimslearningtolivewiththeirdisabilitieswerehelpedtopracticefallingduringthe1950s,sothattheycouldlearntofallwithoutbeinghurt.（）
(A)Aspartoftheirtherapy,youngpoliovictimslearningtolivewiththeirdisabilitieswerehelpedtopracticefallingduringthe1950s
(B)Aspartoftheirtherapy,youngpoliovictimslearningtoliveduringthe1950swiththeirdisabilitieswerehelpedtopracticefalling
(C)Youngpoliovictimslearningtoliveduringthe1950swiththeirdisabilitieswerehelpedtopracticefallingaspartoftheirtherapy
(D)Youngpoliovictimslearningtolivewiththeirdisabilitieswerehelpedtopracticefallingduringthe1950saspartoftheirtherapy
(E)Duringthe1950s,aspartoftheirtherapy,youngpoliovictimslearningtolivewiththeirdisabilitieswerehelpedtopracticefalling