You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. All the content pages in the application use a single master page. The master page uses a static navigation menu to browse the site. <br /> You need to ensure that the content pages can optionally replace the static navigation menu with their own menu controls. <br /> What should you do?()<img src="https://nimg.ppkao.com/2018-07/wangjing/2018073010305692464.jpg?sign=c3167903b533dcada5054fdae1dec4e5&t=62d47bca" /><br /> <img src="https://nimg.ppkao.com/2018-07/wangjing/2018073010310642800.jpg?sign=b82db211384a75e54cfcccca13af7536&t=62d47bca" />
A、A
B、B
C、C
D、D