A、The value of b is: 1 The value of a is: 0 The value of c is: 0
B、The value of b is: 1 The value of a is: 0 The value of c is: 0
C、The value of b is: 1 The value of a is: 0 The value of c is: 0
D、The value of b is: 1 The value of a is: 0 The value of c is: 0