Which of the Following Is True of a Majority Decision

Which of the following is true of a majority decision made by the U.S.Supreme Court?

A) All the judges agree as to the outcome and reasoning used to decide a case.
B) A majority of the judges agree as to the outcome but not the reasoning used to decide a case.
C) A majority of the justices agree as to the outcome and reasoning used to decide a case.
D) An equal number of justices vote for and against the petitioner,and the case remains undecided.