Why was Draco Malfoy chosen to try to destroy Albus Dumbledore?

Maybe it's because Belatrix Lestrange talked to Voldemort about it.  Voldemort decided if he didn't do this, he would kill Draco and his family.

http://inthecapital.com/2012/08/23/draco-malfoy-chooses-towson-over-hogwarts/#ss__24564_1_0__ss