设数组data[0…m]作为循环队列sq的存储空间，front为队头指针，rear为队尾指针，则执行出队操作的语句为

A．sq↑. front: =sq↑. front+1;
B．sq↑. front: =(sq↑. front+1) %maxsize;
C．sq↑. rear: =(sq↑. rear+1) %maxsize;
D．sq↑. front: =(sq↑. front+1) %(maxsize+1);