SAT改进句子题

SAT改进句子题
Because the production company failed to properly advertise its upcoming play,their attendance on opening night,being very low,was not surprising.
划线部分为：their attendance on opening night,being very low,was not surprising
A.their attendance on opening night,being very low,was not surprising
B.this lowered,not surprisingly,their attendance on opening night
C.not to anyone's surprise their attendance was very low on opening night
D.attendance on opening night was,not surprisingly,very low
E.the very low attendance was not to anyone's surprise on opening night
请问这道题该选什么?为什么?E哪里错了?