再来围观一下这道题，关于CXPACKET waits

You are designing a new SQL Server instance that will support a Web application. The Web application
is hosted on a Web farm that contains 32 nodes. The server has 128 GB of memory and 16 processor cores. The application contains two databases and supports both online analytical processing (OLAP) and
online transaction processing (OLTP) workloads. When testing the application, you discover that some
queries run extremely slow and some queries run very fast. You need to ensure that the server processes database queries as fast as possible. What should you do? (More than one answer choice may achieve
A.Execute the following command on the server: exec sp_configure 'maximum degree of parallelism', 1
B.Execute the following command on the server: exec sp_configure 'maximum degree of parallelism',8
C.Use SQL Profiler to identify queries that experience CXPACKET waits. Add ( OPTION MAXDOP 1) to
each query.
D.Use SQL Profiler to identify queries that experience CXPACKET waits.Add (OPTION MAXDOP 8) to
each query.

这道题标准答案是C，为何选C？