已知事务T的封锁序列为：LOCKS(A)…LOCKS(B)…LOCKX(C)…UNLOCK(B)…UNLOCK(A)…UNLOCK(C)事务T的封锁序列为：LOCKS(A)…UNLOCK(A)…LOCKS(B)…LOCKX(C)…UNLOCK(C)…UNLOCK(B)则遵守两段封锁协议的事务是（）ATBTCT和TD没有