In the Mass Effect series, the player makes several choices that affect further events. Some characters will die or survive based on your choices, and your actions have an impact on the ending.
Are any of those choices considered canon? Are some of these choices referenced in the franchise novels and/or comics?
As an example of what I mean, in Star Wars: Knights of the Old Republic, another game developed by BioWare, the light side ending is the canonical "choice."
Is there any indication somewhere about what the "official version" of the story is?