A Soldier Served in Combat Zones in Iraq During 2010

A soldier served in combat zones in Iraq during 2010 and was deployed to Afghanistan in 2013.When is it most important for the nurse to screen for signs and symptoms of posttraumatic stress disorder (PTSD) ?

A) Immediately upon return to the U.S. from Afghanistan
B) Before departing Afghanistan to return to the U.S.
C) One year after returning from Afghanistan
D) Screening should be on-going