I'm not sure since I can't read the passage, but I think D is least important.
It really depends on the person and what they think is more important -
A: You could show that the 2008 Olympics was Michael Phelps' "last hurrah" as it were, as he did not do as well in the 2012 games, BUT the paper is on the 2008 games and not Phelps himself
B: The proof of the use of steroids could be used to make a point that perhaps the security needs to be stepped up, or that in the modern world, sport is becoming too unfair as new drugs are invented because people feel the need to cheat for the cash prizes.
C: This is not really an essay topic, but perhaps you could combine it with B as a controversial point.
D:You could use this point as proof that the bar is being raised every year, and that talent is being found everywhere, better talent, even from poorer countries that you wouldn't expect. You could also tie in Jesse Owens.
Personally, I would use B as drugs is a hot topic around the world, but it is ultimately up to Jacob.
The music was blasting, andit filled the room
Some people may use digital media and communicate with people more than others
