最大容量为 n 的循环队列，队尾指针是rear，队头是front，则队列空的条件是（）。

A.(rear+1)%n==front

B.rear==front

C.rear+1==front

D.(rear-l)%n==front

A.(rear+1)%n==front

B.rear==front

C.rear+1==front

D.(rear-l)%n==front

A.(rear+1) % n == front

B.rear == front

C.rear+1 == front

D.(rear-1) % n == front

A.(rear+l) MOD n=front

B.rear=front

C.rear+1=front

D.(rear-1) MOD n=front

A.front == 0

B.front == rear

C.rear == 0

D.front == rear + 1

A.front == 0

B.front == rear

C.rear == 0

D.front == rear + 1

A.front == rear

B.front != rear

C.front == (rear+1) % m0

D.front != (rear+1) % m0

A.rear==front

B.front+1==rear

C.(rear+1)%n==front

D.(rear+1)%(n+1)==front