Context: In the US , the number one hit on my birthday was " With Or Without You " by U2 , which is rather cool because it \'s quite possibly my favourite U2 song .
Question: What can be inferred about song rankings from the author 's specification of where the U2 song was the number one hit at the time ?
Option 0: The US hits charts is the premier standard by which all songs are judged .
Option 1: None of the above choices .
Option 2: The only ranking system that is relevant to a person 's experience is the one where they live
Option 3: That the number one hit at any given time is most likely not the same in every part of the world .
Answer: 3