If the Upper Display fails:

A.A.The engine display automatically moves to the Inboard display and the Upper display blanks

B.B.he engine display automatically moves to the Outboard display and the Upper display blanks

C.C.The engine display automatically moves to the Lower display and the Upper display blanks

D.D.The engine display automatically moves to the Inboard or Outboard display and the Upper display blanks

正确答案是C