Best documentary film of 2015 Oscar 'Citizenfour' is directed by :

 a) Rosamund Pike
 b) Reese Witherspoon
 c) Laura Poitras
 d) Edward Snowden

KPSC Asst. Jailor-15

Laura Poitras. Citizenfour is a 2014 documentary film directed by Laura Poitras, concerning Edward Snowden and the NSA spying scandal.