You are designing the user interface for an ASP.NET Web application.
The Web application allows several departments to personalize the style of their sections of the Web application. All departmental section styles derive from the core styles of the Web application and can only append to the Web application’s core styles.
The departmental master pages inherit from the Web application’s master page.
You need to ensure that core CSS styles appear in all pages of the Web application.
Which approach should you recommend?

A.
Add a master.css file containing the CSS styles to the Web application.

B.
Add a ContentPlaceHolder containing the CSS styles to the Web application’s master page.

C.
Link from the Web application’s master page to a .css file containing the CSS styles.

D.
Link from the Web application’s master page to a css.ascx file containing the CSS styles.

Explanation:
Need to link css stylev to the base master page. It is allowed to apply style to each pages.