In a gaming application, the Direct3D graphics pipeline is a series of programmable stages used to process final output data as:

In a gaming application, the Direct3D graphics pipeline is a series of programmable stages
used to process final output data as:

A.
triangles.

B.
transformation matrix data.

C.
pixel data.

D.
shader fragments.

Explanation:
http://msdn.microsoft.com/en-us/library/dd904179(v=xnagamestudio.31).aspx