Why was Colonel Billy Mitchell court-martialed and thrown out of the U.S. Army? B?

A.
He stated publicly that Japan would never attack the United States.

B.
He gave secret information to the Germans about the U.S. Army's latest tank designs.

C.
He claimed that it was impossible for an airplane to sink a battleship with bombs.

D.
He insisted that aircraft would be decisive in any future naval war.

Question

Why was Colonel Billy Mitchell court-martialed and thrown out of the U.S. Army?	 B?
 
 A.
He stated publicly that Japan would never attack the United States.
 
 B.
He gave secret information to the Germans about the U.S. Army's latest tank designs.
 
 C.
He claimed that it was impossible for an airplane to sink a battleship with bombs.
 
 D.
He insisted that aircraft would be decisive in any future naval war.

anonymous · Answer

I am beginning to think it might be D.

anonymous · Answer

why?

anonymous · Answer

Scroll down to Billy Mitchell: Air Power Advocate http://militaryhistory.about.com/od/airforce/p/Military-Aviation-Brigadier-General-Billy-Mitchell.htm