三凹征是指( )

"三凹征"是指( )

A.胸骨上窝、锁骨上窝、肋间隙在吸气时明显下陷B.胸骨上窝、锁骨上窝、肋间隙在呼气时明显下陷C.胸骨上窝、锁骨上窝、纵隔在吸气时明显下陷D.胸骨上窝、锁骨上窝、纵隔在呼气时明显下陷E.胸骨上窝、锁骨下窝、纵隔在吸气时明显下陷