In the Context of a Voting System, Independence of Irrelevant $A$

In the context of a voting system, independence of irrelevant alternatives means that:

A) if everyone prefers $A$ to $B$ , then $A$ should beat $B$
B) if $A$ beats $B$ , and $B$ beats $C$ , then $A$ should beat $C$
C) there this no person that always gets his way, regardless of everyone else's preferences
D) the ranking between any two outcomes $\mathrm{A}$ and $\mathrm{B}$ should not depend on whether some third outcome $C$ is also available