单项选择题
Windows98充分利用了386处理器的3种工作模式以运行不同的应用程序。下面是有关 Windows98的工作模式与应用程序的一些叙述：
①在实模式下可以同时运行多个DOS应用程序
②利用Windows98的MS-DOS方式运行DOS程序时，在窗口方式下运行时系统处于虚拟8086模式，在全屏幕方式下运行时系统处于实模式
③在虚拟8086模式下运行DOS应用程序时，处理器实际上是运行在保护模式下
④所有的Win16应用程序和Win32应用程序均只能在保护模式下运行
在上面的叙述中，( )是错误的。
- A.①②
B．①②③
C．①②③④
D．③④
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