Two Studies, ____________ and ___________ Were Published in 2008, Focusing

Two studies, ____________ and ___________ were published in 2008, focusing on drug use among adolescents between 2006 and 2007.

A) Monitoring the Future Survey, National Survey on Drug Use and Health
B) Evaluating the Past Survey, National Survey on Drug Use and Health
C) Methods of Drug Abuse Survey, National Survey on Drug Use and Health
D) Monitoring the Future Survey, North American Survey on Drug Use and Health Effects
E) none of the above