Which directive defines master page-precise attributes that are used by the ASP.NET page parser and compiler?

Which directive defines master page-precise attributes that are used by the ASP.NET page parser
and compiler?

A.
@ MasterType

B.
@ Master

C.
@ PageType

D.
@ MasterPage

Explanation:
CHAPTER 2 Using Master Pages, Themes, and Caching
Lesson 1: Using Master Pages
Creating a Master Page (page 45)