Why was the department of defense created

AWho plays the US Army and Navyin one executive department
Bto establish a military chain of command
Cto end this agreement between the US Army and Navy
Dto lessen the instance of military abuse of power

Verified Answer :

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.