which process should you attach the debugger?

You create a SharePoint farm solution that contains a Web Part.

You need to debug the Web Part by using Microsoft Visual Studio 2010.

To which process should you attach the debugger?

A.
owstimer.exe

B.
spucworkerprocess.exe

C.
spucworkerprocessproxy.exe

D.
w3wp.exe

Explanation:
Farm solutions are run by IIS worker process, which is w3wp.exe

Farm Solutions
http://msdn.microsoft.com/en-us/library/ff798425.aspx