請教大全411

GiGi

411.In the late seventh century, in a dispute over whether the Prophet Muhammad’s son-in-law, Ali, should carry on as the fourth caliph, Muhammad’s successor, Islam split into two branches, the Sunnis and the Shiites.
(A) over whether the Prophet Muhammad’s son-in-law, Ali, should carry on as the fourth caliph, Muhammad’s successor
(B) over if Ali, the Prophet Muhammad’s son-in-law, was going to carry on and be the fourth caliph, Muhammad’s successor
(C) over whether Ali, the Prophet Muhammad’s son-in-law, was going to carry on and be the fourth caliph, Muhammad’s successor
(D) as to whether the fourth caliph, Muhammad’s successor, is to be the Prophet Muhammad’s son-in-low, Ali
(E) concerning if the fourth caliph, Muhammad’s successor, was to be the Prophet Muhammad’s son-in-law, Ali

想請問(a)與(c)如何選擇?

dansy

我的理解是C中carry on 和  be 说的是一个意思， 所以重复。