What Issue Alledegly Led to the Rift Between Muhammad Ali

What issue alledegly led to the rift between Muhammad Ali, the former world heavyweight champion, and Elijah Muhammad, leader of Nation of Islam movement?

A) Ali wanted to make a return to boxing to make money.
B) Ali would not fast during Ramadan in case it had a negative impact on his training.
C) Ali agreed to fight on Eid al-Adha.
D) Ali stopped going to Mosque on Fridays as it interfered with his training schedule.