Which of the following is/are true of blunt renal trauma?
选项：

A: Blunt renal trauma and penetrating renal injuries are managed similarly.
B: Blunt renal trauma with urinary extravasation always requires surgical exploration.
C: Blunt renal trauma must be evaluated by contrast studies using either IVP or CT.
D: Blunt renal trauma requires exploration only when the patient exhibits hemodynamic instability.
E: Any kidney fractured by blunt renal trauma must be explored.