Why was the department of defense created
a) who plays the us army and navyin one executive department
b) to establish a military chain of command
c) to end this agreement between the us army and navy
d) to lessen the instance of military abuse of power

I think the correct answer from the choices listed above is option B. The  department of defense was created in order to to establish a military chain of command. The decision to unify the different services under one Department led to the creation of the National Military Establishment in 1947. 

Ithink that would be false, hope that this .