With the isolation valve set to AUTO, which of the following sta

With the isolation valve set to AUTO, which of the following statement is false?

A.When any pack switch is OFF. the isolation valve will open automatically

B.When any engine bleed air switch is OFF. the isolation valve will open automatically

C.When any engine bleed air switch or APU bleed air switch is OFF. the isolation valve will open automatically

D.The isolation valve will close only when all the pack switches and engine bleed air switches are open

正确答案是C