设m为同类资源数r的数目,n为系统中并发进程数。当n个进程共享m个互斥资源r时,每个进程对r的最大需求是w,则下列情况会出现系统死锁的是( A )
A.
(1)m=2,n=1,w=2
B.
(2)m=2,n=2,w=1
C.
(3)m=4,n=3,w=2
D.
(4)m=4,n=2,w=3
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