Which statements are true concerning the effect of the >> and >>> operators?（）  

A、For non-negative values of the left operand， the >> and >>> operators will have the same effect.

B、The result of （-1 >> 1） is 0.

C、The result of （-1 >>> 1） is -1.

D、The value returned by >>> will never be negative as long as the value of the right operand is equal     to or greater than 1.

E、When using the >> operator， the leftmost bit of the bit representation of the resulting value will    always be the same bit value as the leftmost bit of the bit representation of the left operand.