—Could you please tell me             ?

—Bus No. 536 will take you right there.

A. where Hubei Museum is

B. what Hubei Museum is like

C. which bus I should take to Hubei Museum

若在系统中有若干个互斥资源R，6个并发进程，每个进程都需要5个资源R，那么使系统不发生死锁的资源R的最少数目为（）。

A．30

B．25

C．10

D．5