Which Member of the Supreme Court Writes the Majority Opinion

Which member of the Supreme Court writes the majority opinion?

A) The Chief Justice, if he votes with the majority, always writes the majority opinion.
B) The Chief Justice, if he votes with the majority, can assign the majority opinion.
C) The Chief Justice always writes the majority opinion, no matter how he votes.
D) The most junior justice must write the majority opinion.
E) The ranking opposition justice writes the majority opinion if nobody else will.